It wouldn't be really fair to compare a car on steet tires to a a car on race tires. As far as the suspension goes, I'm sure the C6R is way too stiff for anything but the smoothest roads. I was just trying to point out how much it takes to overcome extra weight. I'm sure that the race car would easily handle the ZR1 in every category, but even I was surprised at how much it pulled it in acceleration, especially since the C6R was not set-up for standing starts.
Speaking of the C6R, it looks like they got beat by that damned BMW and the Ferrari at Sebring.