An XRT will win, that's what my money's on. (at least that's what I'm hoping!)
no other car can go the distance like an XRT. I've had nearly identical front/rear tyre temps and wear from it, and It really hits the sweetspot around lap 20+.
With the others, you end up overheating the fronts if you're really going for it, and once they're gone, they're gone.
With the XRT it's a lot easier to manage the speed/wear balance.
It's funny, last week I didn't really like the car. But after doing a few laps in it (300+
) I've fallen in love!