Why don't we just say that the two cars (the Z06 option anyway)are comparable in performace? As far as looks go ... well, the vette looks like all the other vettes out there unless you open the hood or look at the back tires. The Viper doesn't have a 'baby motor' option so ALL Vipers are fast, not just a small percentage of them. With slicks the Viper should win every time.
If you want to go fast, then you're not going with a stocker anyway. The Viper is easier to modify and gets bigger numbers easily.
The vette forum had a comment that the vette sounds like a "race car" and the Viper sounds like a "UPS Truck". I think that the Viper sounds like crap stock, and should be fixed immediately upon purchase. Of course that would mean that it sounds better than any vette and wins the hp war easily. Sorry, but the government required Cats are sh-t.
A 1,000hp Supra? Can't imagine how much that cost, probably as much as a 15-2000hp Viper?
Looks wise, everyone knows a Viper from a mile away. A vette looks like a camaro until it's close and then you can't tell if it's a vette or a Z06 unless it stops. I don't see much comparison between them. Viper all the way.
I have 3 cars that make more hp than a STOCK Viper, but my Viper makes 720rwhp and that's the way it should be. 10.5 et on Michelins should be enough to kill any vette I'll ever meet, including the Z06 that beat my Stealth last year. Unfortunately, I've only seen 2 Z06's in my life. There isn't enough of them to go around.
Ted