the Enzo is definitely the faster car on the straight or on the corners with its F1 technology / aerodynamics on it.
But in comparison of the price tag the SV is the better car.
The msrp of the 02 Ferrari Enzo in game is 1,000,000 and the restore rigidity is 500,000.
I am very sure without restoring the rigidity the performance will be very reduced because when I bought my car on the first day it was way better than what it is now.
So if there is another car that you want you shouldnt get the Enzo because it is too much.