Just noticed that you are talking about a modded Vette thats pushing close to 440 bhp and comparing it to a stock M3. The stock Vette (404ps) runs 8.15 on the Ring and the M3 beats that by full 11 seconds. Now thats a lot! The Z51 Vette does 7.59. I believe the DCT car is going to have that (I've ordered one). The CSL is going to be in another league but will cost a leg, the standart m3 already costs an arm over here.
I'll take my chances with a C6 lets just hope the DCT is all that its hyped to be!