You didn't read what I wrote very carefully did you. This is a racing series in which all the cars are equally modified, all are N/A as far as I know, but have massive modifications otherwise. Basically all cars had major modifications, but performance still slightly resembles stock performance. If the driver knows what he is doing, and remains at the right rpm coming out of a corner, he will be able to accelerate enough to prevent the Z06 from pulling away, thus leaving the possibility open for himself to pass in the turns. Overall if you look at both cars carefully you might find(or at least I find) that the NSX (no, not the Acura NSX, the Honda NSX Type-R) appears to have more potential on a track, however it is much more difficult to drive it that well, and thus the Z06 is much more likely to win.