The GT-One Road Car is ok, but the GT-One Race cars are freakin great. I have the race one that's red with white flames, but not the one you win from the license test.
The problem most people have with the GT One is that you can't drive it like a tuned street car.....meaning that you can't slide tail out, you can't enter corners a little sideways, ect...
You need to actually DRIVE the Gt One like an actuall race car and let the downforce and suspension balance the car. That means diving into corners on the brakes, apexing the corner while feathering the throttle and letting the differential work, and powering out of the corner nice and straight.
The Escudo is just a beast, but if the suspension is set correctly, it corner's like it's on rails, even at 170-190mph or more. I've NEVER had to wall ride with the Escudo.