The GT-Line tops a three-spec range, starting with the base model S manual at $22,990 drive-away (add another grand for the auto).
Then it's $24,990 drive-away for the Sport (plus $1000 for the auto) and $29,990 drive-away for the GT-Line, which is auto-only and has a turbo engine.
That's some pretty fancy footwork with the spreadsheets (which I know isn't a thing, imagine how dirty the keyboard would be).
If you've bought a GT-Line, your kebab short of thirty grand gets you 17-inch alloys, a six-speaker stereo, climate control, a reversing camera, keyless entry and start, rear parking sensors, cruise control, sat nav, auto LED headlights with auto high beam, auto wipers, fake leather bits and pieces, powered and heated folding mirrors, a sunroof and a space-saver spare.
The speakers are a bit tinny, but as long as you don't turn them up too much, you'll be fine. Handily, CarPlay is wireless and you can have two phones connected at once to the Bluetooth system. Try that in a Ferrari.