The Alfa looks the best, the Stinger has a hatchback, but 3 years ago I went with the 2019 G70. Because front engine, RWD, LSD, and most important to me manual transmission. That took the other two right off my list.
After 3 years, some thoughts. The 2.0 turbo motor is adequate for such a porky car, when in Sport mode. Comfort and Eco modes it feels old Corolla slow. It has modern "low down torque" tuning, and falls on it's face as the revs climb - gutless well before redline. In Sport and driven with some vigor, low 20s MPG. On my commute in Eco, I can nudge up to 30MPG indicated. Averaging around 25 MPG.
Shifter is fine, clutch effort is very low without much feel. That can be a challenge, since off-idle tip in is wildly different between the three drive modes (Eco, Comfort, Sport) - that combined with a crappy one-second throttle kill after releasing clutch "for smooth take off" - makes you feel like a new driver every time you switch modes. Brembo brakes are real good, but dusty.
LDS is OK, but noisy in parking garages - which dealer says is normal. The 2.0 Sport MT comes with PS4s, in a silly 19" size for looks, and staggered width. I would prefer 18" square for ease of rotation. Suspension is meh, suitably soft springs for a commuter. It could use a lot more rebound damping out back, on dips the back oscillates a lot. Steering is artificial - EPS. In Eco and Comfort, may as well be a 70's Buick - drive with a finger. Sport mode adds weight, but still no real communication to the front.
It drives a lot bigger than it's dimensions suggest. Front end is tall, and way out there compared to dimensionally similar 2008 TSX I have. With that, the rear seat is decorative - reminds me of the luxury coupe rear seats. Headroom OK, but your knees are buried in the back of the front seats, and I'm only 5'8" and like to sit on top of the wheel. The trunk room screams "we aren't used to packaging RWD Diff under a car", very little vertical room - about 1 suitcase tall.
Fit/finish/interior seem OK to me, but I'm used to old ratty Miata. Radio has an actual volume knob, and the HVAC system is also real buttons / knobs. Most of the rest of the infotainment is via touchscreen.
So far, only 2 recalls (ABS module catches fire, trunk latch pin breaks). First service, noted it was 1qt low on oil already. Dealer has been overfilling since then by 1/2 qt. Now at 13k miles, valve cover gasket leaking notably on passenger side, stinks of burnt oil after you park it.
Verdict: Great on paper, adequate as an "appliance plus" level commuter, but not engaging as I hoped.