I have not driven the GT500, but all I could say is that the ZO6 is a beast! I actually got a lil scared when drove one coz
there's a lot of power under that hood. First thing I noticed is that it's very easy to get the car tail end happy.
It really takes a lot of discipline and self control when driving a car like that. If you have a heavy right foot like me, I advice you go to a driving school first before pushing the ZO6 to it's limits.
Btw, the mild to wild mod is something as well. I love that ZO6 mod.