I didn't think I was starting anything, just stating the obvious, and didn't want to make it a Corvette discussion on a Viper forum, but OK.
The C7 Z06 has more torque (625hp/635tq) than the C6 ZR1 and undoubtedly will have equal to or more hp than the ZR1 when testing is complete. It has better aerodynamics (more down force than any other car GM has ever made), and is also the fastest Corvette ever produced according CEO Mark Ruess and Chief Engineer Tadge Juechter. On it's very first outing (the car is still in the process of being optimized in performance) broke the Milford track record previously set by the ZR1. I can go on, submit interviews and videos by Chief Engineer Tadge Juechter, but I suspect none of it would change your opinion.
Go!
Maybe these things are so obvious to you because you chose to rely on GM's assurances instead of doing some math and reality check yourself? Check the Hennessey stunt if you really think new Corvette has superior aerodynamics, and this is the narrower car, with less air resistance than the wider Z06. with ground effects and more rolling resistance and air lift from wider tires. If anything, the new Z06 is the best reason to buy a Viper, unless one does not mind driving an automatic to at least have a few claimed figures become a reality. Should be interesting to see how much higher the stall speed is going to be on Z06 to compensate for extra weight. LOL