Mercedes-Benz GT vs Porsche 718

What's the difference?

The Mercedes-AMG GT Black Series is a rare beast; in the sense that it’s both unattainable and that it makes you feel like a superhero behind the wheel.

There is more performance on offer than most can hope of using, but the best thing about Mercedes’ latest supercar is its approachability.

In my experience, the more expensive a car gets, the more stressful driving them becomes, but the Mercedes-AMG GT Black Series does something I didn’t think was possible, and turns a near-$1 million supercar into something fun.

The 718 Cayman Style Edition only costs a bit more than the entry-grade Cayman it's based on, but opens up more special colours and contrasting features from the wheels to decals, even leather upholstery. The value is good, the look is enhanced and the car remains superb to drive on the right roads.

Living with a Cayman daily is ‘do-able’ but you’ll have to be understanding given it's not the most user-friendly car to drive, and then there’s the low-level safety tech.

But in return, you’ll own one of the best and relatively affordable prestige sports cars ever made and one of the last of the combustion-powered Porsche Caymans.

Most high-performance brands have their hardcore, track-focused models, from the Porsche 911 GT2 RS to the McLaren 765LT and the Ferrari 488 Pista.

For Mercedes-Benz, it’s the Black Series, a badge which could be found in the past on the SLK, CLK, SL-Class, C-Class, but for 2021 it’s now found on the back of the GT supercar.

To differentiate it from the rest of the ‘standard’ Mercedes-AMG GT range, a slew of racecar-like components are added, such as a fixed rear wing (with deployable insert), vented front fenders, extended front splitter and fixed-back seats.

In fact, so different is the Black Series, that the only panel that carries over from the GT is the roof, which is a carbon-fibre component to keep weight down.

Other carbon-fibre bits include the front fenders, front and rear bumpers, and rear hatch.

The most in-your-face addition might be the deeply vented bonnet, designed to evacuate hot air from the engine bay, while the hero 'Magma Beam' orange colour that juxtaposes all the exposed carbon-fibre panels is a real attention grabber.

From the outside, the Mercedes-AMG GT Black Series is bold, brash and in-your-face, but that’s exactly what a race car should be – in my opinion, at least.

I absolutely love how the Black Series looks like a Need for Speed or Forza Horizon video game car brought to life, and will turn heads anywhere you go.

Inside, the Black Series is clad in soft-touch 'Dinamica' and orange contrast stitching across many of the touchpoints such as dashboard, steering wheel and door cards.

And with fixed-back bucket seats, a racing harness and a roll cage, you’d be forgiven for thinking the AMG GT Black Series is all about function over form, but there are small touches to make it easier to live with on the road.

The multimedia touchpad controller falls easily in hand, while the shifter is flanked by an array of light-up buttons to adjust settings like adaptive suspension, exhaust note and rear spoiler angle.

Overall, the Black Series’ cabin is well-laid out like a standard AMG GT, with some nice flourishes to stand it apart.

The 718 Cayman is often labelled as the 'junior 911' but that downplays its status as an outstanding sports car in its own right.

It’s not a smaller version of the 911, at all, but it is smaller than a 911. Not by much, though. The Cayman is 140mm shorter in length than the 911 at 4379mm end-to-end. Interestingly, the Cayman has a longer wheelbase at 2475mm and is taller at 1295mm.

The 718 Cayman is beginning to date in its design with this generation of the sports car arriving eight years ago. From the outside it’s holding up well in terms of styling , but inside it feels very 2016 with the small media screen and analogue dials.

It gives me a weird nostalgic feeling I normally only get driving older cars, but in a current model. Which could be why Porsche is jazzing the Cayman up with this Style Edition.

The Style Edition enhances the look of the entry-grade Cayman with 20-inch 718 'Spyder' wheels in a high gloss black or white finish, and there’s a choice of six special colours ranging from the Crayon hue our car wore to 'Ruby Star Neo', 'Shark Blue', 'Carmine Red' and 'Arctic Grey'.

The Style Edition also adds black sport tailpipes, full-colour Porsche crests on the wheel hub covers, a black leather interior with contrasting Crayon stitching, Porsche crest embossed headrests, illuminated door sills and floor mats with Crayon contrast stitching.  

Buyers can also choose a 'Contrast Package' in black or white which adds Porsche lettering to the side of the car and a strip to the bonnet.

As a two-seat coupe, the AMG GT Black Series isn’t the most practical of cars, but then again, it isn’t trying to be.

The cabin is big enough to accommodate six-foot tall (183cm) passengers like myself, though the fixed-back seats are designed to be form-fitting even for slender frames.

Storage options inside include two cupholders and a shallow underarm storage cubby, and that’s about it.

Unlike the standard GT, the Black Series’ doors forgo the small storage pocket – likely to keep weight down.

Opening the boot reveals enough space for a set of golf clubs or a few weekend bags, but not much else.

Mercedes does not list the volume available in the Black Series, but with the inclusion of a rollcage and special reinforcement components to help transfer the downforce of the rear wing to the chassis, it’s safe to assume it is less than the 176 litres offered in the AMG GT.

The 718 Cayman doesn’t have back seats -  it's a two-seater sports car. Cabin storage is almost non-existent but is saved by a glove box and pull-out door pockets which are bigger than they look.

Surprisingly, there are three cupholders - two which pop out of the dashboard above the glove box and another in the small centre console bin.

Cargo space isn’t bad for a two-seater sports car with 184-litre rear boot and a front boot with a 150-litre capacity. That’s roughly one nine-year old child as you can see from the photos. My son wanted to sit in there, which I agreed to, but I said no when he asked me to shut the bonnet.

The 718 Cayman Style Edition lists for $136,700 and this is for the manual version, the auto is $5340 more. All up Porsche is asking $4200 more than the entry-grade Cayman it’s based on. In return you’re getting some nice features you won't find on the standard model. 

There's the chunky black exhaust tips, the full-coloured crests on the wheel caps and inside is the black leather interior package with embossed headrests, illuminated door sills, and floor mats with 'Crayon'-coloured stitching.

Buyers can also specify one of two Style Edition contrast packages - one in Black and one in White -  at no extra cost. Ours had the Black package specified and added the Porsche decals to the side of the car, the stripe on the bonnet and the gloss black 20-inch wheels.

The colour of our car was Crayon which comes as part of the bespoke colour offerings with the Style Edition.

Along with these Style Edition features there are the standard features of the entry-grade Cayman, including LED headlights, proximity unlocking, power adjustable sports seats, media display with sat nav, Apple CarPlay and dual-zone climate control.

If you’ve been driving new cars lately you might be a bit disappointed by the Cayman’s small media display (it’s a 7.0-inch screen which is tiny by today’s standards) there’s also no Android Auto available (just Apple CarPlay) and safety tech is relatively light-on, too. You can read about this further down.    

It should be pointed out here that our car was fitted with a dual-clutch automatic transmission and the optional adaptive cruise control ($2320).

Powering the GT Black Series is AMG’s ubiquitous 4.0-litre twin-turbo-petrol V8 engine, with a few modifications.

For starters, a flat-plane crank is used for the V8 for improved throttle response, less weight and different firing order that makes it more free revving than the standard engine.

In fact, so different is the engine that Mercedes-AMG has given the Black Series’ powerplant its own internal code, with only three technicians in Affalterbach qualified to put it together.

The result is peak power of 537kW available from 6700-6900rpm, while maximum torque reaches 800Nm, on tap from 2000-6000rpm.

For those keeping track, that’s 107kW/100Nm more than the GT R.

Sending drive exclusively to the rear wheels via a seven-speed dual-clutch automatic transmission, the AMG GT Black Series will accelerate from 0-100km/h in just 3.2 seconds and top out at 325km/h.

So, under the bonnet of a Cayman is the front boot, but if it’s the engine you’re after you’ll need to go through the rear hatch because this is a mid-engined car.

Getting to the engine means removing several fixtures and covers which begins to feel like you’re dissembling the vehicle and comes with a rising anxiety that it all won’t go back together.

But it all clicks back in. It’s just a slow and tedious process. Fortunately, oil and water can be added by removing the circular covers you can see in the images. 

Under the layers of covers, deep down just in front of the rear axle, is the Cayman’s 2.0-litre ‘flat’ four-cylinder turbo-petrol engine which makes 220kW and 380Nm. A seven-speed dual-clutch automatic transmission sends drive to the rear wheels. 

It’s not a huge amount of power but the Cayman only weighs 1365kg and so can get from 0-100km/h in 5.1 seconds. Not brutally quick but the way this car handles is what you’ll like.  

Oh, and just to be clear, the Style Edition doesn’t bring any extra power or engine changes. The outputs and performance are the same as the entry-grade Cayman.

Officially, the GT Black Series will consume 13.2 litres per 100km, making it thirstier than the GT R that returns 11.4L/100km.

The GT Black Series will require 98RON petrol and this, coupled with the high consumption average, will mean a big bill at the bowser.

However, as such a focused performance machine, fuel economy in the Mercedes-AMG GT Black Series is less of an important point than something like a charismatic and dynamic engine.

Porsche says that after a combination of open and urban roads the Cayman’s fuel consumption should be 7.0L/100km. My 143km fuel test, taking in country roads and school runs, used 21.8L of petrol and equates to 15.2L/100km. Which means I had about twice as much fun as Porsche did when it recorded its fuel consumption.

The 64-litre tanks means in theory you should be able to travel 914km between fills if you’re conservative with fuel.

We’ve driven some very fast cars before, so make no mistake when we say the AMG GT Black Series is seriously quick.

The right pedal might as well be warp drive on the, Starship Enterprise, because as soon as you floor the throttle, you’re pinned to the back of the race seat and the only reprise comes from lifting off.

Aside from the immense speed, what is – surprisingly – noticeable is the noise, or lack of it.

The flat-plane crank V8’s different firing order means it doesn’t have the same burbly notes as the standard AMG GT, it’s a racier tone. That’s not a bad thing, mind you, just a different note.

And while the flat-plane crank V8 changes the exhaust note, it also makes the engine freer revving and lively.

With 537kW/800Nm on tap, you sort of have to trust the suspension and aerodynamics will do their thing to keep the AMG GT Black Series on the track, and it’s here where I think Mercedes-AMG has pulled off some sort of magic.

The combination of adaptive dampers, active aero, beefed-up anti-roll bars and a unique Michelin Pilotsport Cup 2 R tyre (featuring a silhouette of the Black Series laser etched into the sidewall) results in a terrifyingly capable vehicle at Phillip Island.

I am the first to admit that I am no Lewis Hamilton behind the wheel, I often get on the throttle too early, I can never nail a double-apex corner and my heel-toe-technique could use more work, but behind the wheel of the GT Black Series, I felt like Ayrton Senna’s spirit had taken the wheel on my behalf.

Cornering in the Black Series felt like nothing else, and regardless of what the speedo was saying, the nose of the ferocious GT flagship would just point wherever I wanted it to go.

Luckily the braking system is also up to task – thanks to carbon ceramic units fitted as standard, as well as unique pads and discs.

The brakes bite almost immediately, giving you the confidence to hit the stop pedal at the last moment before tipping into a corner.

I think the biggest compliment I can pay to the Mercedes-AMG GT Black Series is that it increases that narrow band of fun you can have in a supercar.

Sure, a driver with more skill could pilot the AMG GT Black Series with more grace, and finesse it around the corners a little quicker, but the approachability of the performance on offer is amazing.

Nothing feels intimidating, nothing feels unapproachable. The GT Black Series is so communicative that it gives drivers the confidence to feel like a hero around a race track.

If there is any criticism of the car, it’s that its limits are so high they are hard to explore, even on a circuit like Phillip Island, but maybe that takes more skill than I have, or more than just a handful of laps behind the wheel.

Of particular note, too, is that the engine of the Mercedes-AMG GT Black Series is found in the front.

There’s a reason why some exotic supercars will opt for the mid- or rear-engine layout, but Mercedes has managed to craft a front-engine, rear-drive machine that will keep up with the best the world has to offer.

The 718 Cayman Style Edition doesn’t come with any performance advantages over the already brilliant entry-grade Cayman it’s based on. And it is brilliant to drive. Several big steps above Audi’s TT, Nissan's Z or Toyota and BMW’s Supra/Z4 'twins under the skin' in terms of handling, steering and engagement. 

That said, the Cayman isn’t as easy to drive as any of those cars. The steering is heavy, the accelerator is stiff, the dual-clutch auto transmission feels a bit rough and the turbo lags, then sends in the mumbo a bit too fast and too late. Oh, and and the seats are a tad tight.

But I can overlook all of this because on good winding country roads the Cayman feels like a water drop running down a wall, moving naturally and harmoniously around whatever it encounters.

The day-to-day school runs and grocery getting isn’t quite as poetic, and a Cayman proves challenging in the real world over potholes and in supermarket car parks. You’d have to love the Cayman for better or worse, as many do, to live with it daily. If you can't, there's the Audi TT.

The almost complete lack of standard advanced safety technology on board the Porsche Cayman might be a deal-breaker for you. There’s no AEB (forward or reverse), no cross-traffic alert and no lane keeping assistance. But there is blind-spot warning, front and rear parking sensors and a reversing camera. Adaptive cruise control is a $2320 option.

The 718 Cayman hasn’t been crash tested and therefore doesn’t have an ANCAP rating, but you’ll be pleased to know there are four airbags covering the driver and passenger.

Like all new Mercedes models sold in 2021, the Mercedes-AMG GT Black Series comes with a five-year/unlimited kilometre warranty with roadside assist over that period.

Mercedes’ warranty easily outclasses other premium marques like BMW, Porsche and Audi, who each offer a three-year/unlimited kilometre coverage, and Lexus (four year/100,000km), while matching Jaguar and newcomer Genesis.

Scheduled servicing intervals are every 12 months or 20,000km, whichever occurs first.

Servicing costs for the Black Series were unavailable to us at the time of publishing, but maintenance of the GT coupe will ring the till up at $4750 over three years.

The Cayman Style Edition is covered by a three-year/unlimited kilometre warranty and servicing is needed every 12 months or 20,000km.

With Porsche, final service costs are determined at the dealer level (in line with variable labour rates by state/territory).

We'd like to see the warranty coverage increased to five years/unlimited kilometres which will bring it in line with more mainstream brands.