I don't think that you can compare the two cars. They are in two different segments of the market - the Corvette is a sports/high performance car while the XLR is in the luxury roadster segment. In spite of it's performance potential, the decision makers at GM would never let the XLR out-perform or out-hp the Corvette. The Vette will always rule when it comes to performance. They want to build TWO cars that lead BOTH segments of the market.