It depends on where are you using it. On straight runways with less turns, the Viper owns the Z06. On the other hand, for canyons and technical racing, the Z06 is better.
Translation:
Straight line drags - Viper wins
For general racing in NFS:C - Corvette wins.
The REAL DK has spoken
it also depends on the driver and also whether you are using automatic or manual and the setup makes a difference too.
I still say ZO6 is better, there is more general racing than there is straight so go with the ZO6. That is what sucks about this game there is no gigantic straightaway on any of the tracks like in MW.
agreed.... they both have their advantages and disadvantages. But i still like the Viper.