Chris Harris did a side-by-side comparison of the C7 corvette and a 911...his conclusion: the porsche is a better car, but the margin between it and the C7 is pretty close. The Corvette doesn't have the best handling or balance, but it's pretty dam good for its price.
As Chris says, the porsche is better, but for the price difference, it had better well be. Otherwise why spend all of the extra money?