I have all three cars, the 787B, the GT1 race car, and the R390 race car. I find the 787B to be the slowest of the group, but the best for tire wear. It has so much downforce that it allows you to run harder tires and still out run the competition in high speed corners. Its handling doesn't change at all as the tires wear, either. The GT1 tends to wear the fronts out quickly and starts to understeer. The R390 is pretty even, but even though I can often turn better laps with it than the 787b, I find it a real handful to keep it under control compared to the Mazda.