Talking about overall cars.... speed power handling.
Oh dude let me tell you this.... I was at the last NASA even in road atlanta and guess what happen, there was a M6 in the track, My friend who is an instructor there, he was driving his 325 turbo in the track, when by turn 7 he pulls aside to let pass a C6 zo6 he said he look at the data of that lap and the ZO6 passed him at around 20mph over his track speed....... But then the ZO6 pulls fast to the side too......

so he looks to the left and there it is the M6 passing him like he was standing still, and a second latter passed the ZO6 and kept pullin all thru 8 and the straightaway......
If I had money I will get an M6 that is a the car of cars, and besides is german..
