C&D has an article "Z06 vs Viper" this month. They say the Viper is quicker by 0.1-0.2 and that the Z slides too easily. Why don't they ever mention the tires? Run-flats vs non run-flats is apples & oranges. I know they're compairing stock to stock but at least they could mention in the article that it's not a fair comparison. Put the same tires on the Z and see what happens.