What's the difference?
If you're looking for a sleek, two-door coupe with a sparkling chassis, rear-wheel drive and a charismatic turbo straight-six, BMW has you covered with about eight choices. That should be that, then. But wait. There's more.
Since 1965, Alpina - the name of a resurrected a typewriter company - has collaborated closely with BMW to produce distinct, high performance Alpina-badged cars. It actually started with a Weber dual-carburettor unofficial conversion for the BMW 1500 in 1962 and over the years built into a racing operation winning championships and races like the Spa 24 Hours.
Alpina returned to Australian shores in 2017 after a long hiatus with a new range including the BMW 4 Series based B4. Not long after, BMW updated the 4 in what it calls LCI (Lifecycle Impulse), so Alpina followed suit with a price drop, new gear and called it the B4 S.
Years ago, McLaren wasn't really making McLarens. The ill-fated SLR was still in production, but was an oddity that made little sense - it was a highly specialised Mercedes and built to sell for crazy money to mega-rich F1 fans. Production was down to a trickle,and the iconic and legendary F1 had completed its run a decade earlier.
The "new" McLaren Automotive had a shaky start in 2011 with the unloved MP4-12C, which became the 12C and then morphed into the 650S, getting better with each reinvention.
The P1 was the car that really grabbed the world's attention and was then-new designer Rob Melville's first project for the British sports car maker.
Last year, McLaren sold its 10,000th car and production numbers are closing in on Lamborghini's. Sales have almost doubled in Australia and Rob Melville is still there, and is now the Design Director. The company, clearly, has done very, very well.
Now it's come time for McLaren's second generation, starting with the 720S. Replacing the 650S, it's the new Super Series McLaren (fitting in above the Sport Series 540 and 570S and below the Ultimate P1 and still-mysterious BP23), and is a car McLaren claims has no direct competitors from its rivals at Ferrari or Lamborghini.
It has a twin-turbo V8, a carbon fibre tub, rear-wheel drive and bristles with cleverness.
You could almost call the B4 S the anti-M4. It's still fast and practical but from a completely different perspective. It's much more a grand tourer than the M4 and even with the Akrapovic exhaust (usually a byword for joyous, anti-social racket), subtle.
For some, the price won't matter because the Alpina delivers what they want - M4-like straight line performance without the histrionics or the uncompromising chassis. And there's also a bit of that perverse exclusivity of the styling that you won't get anywhere else.
Past McLarens have been accused of being a bit soulless, but this one is alive. The last time I felt like this in a car was a Ferrari F12, one of the scariest but most brilliant cars I've ever driven. Except the 720S isn't scary on the road, just sheer genius.
The 720S doesn't necessarily beat the competition but it opens up new ways of doing supercar things. It's a car that looks amazing, is more than fit for purpose but has a wider range of talents than the others.
That makes it ever more compelling, both as a piece of automotive brilliance to admire, andl as something to consider when you've got half a Sydney apartment to spend on a car.
Australian roads await, but the drive through rural English country roads and villages was a great preview. All I can say is: gimme one.