As I have both Vettes and Vipers I can tell you that the Viper has the edge in power and torque over a stock C5. The Awe factor
goes to the Viper no question! I would have no problem driving a C5 as a daily driver but I would not want to drive the Viper daily any more than I would any other exotic. For comfort and civility the C5 has the edge with more room, visibility, and creature comforts.
Now when your talking about the Z06 vs Viper they compare more evenly as the torque of the Z06 feels (sotp) much more like any of the Vipers I have owned. The creature comforts are nearly gone, and the cabin is more noisy than the other C5s.
The down side of the Viper is it is more than 50% more expensive,
but there is no getting around that it is a different car than a Vette and worth every penny!
As for the few tenths of a second faster or slower, it just proves again it comes down to the driver on any given day.
No one should spend the extra money on a Viper just for a few tenths of a second, it doesn't make good financial sense.
It's all the other "stuff" that makes the Viper worth the extra money- The styling, exclusivity, Awe factor, etc.
I do think the new 03 Viper styling moves the cars even closer, remember the 50th anniversary of the Vette is coming up (03 I think) and DC can't rely on 500 HP to sell the Viper alone. I think the Vette will get new styling and 450-475 HP by 03-04. Time will tell, but in the mean time I'll take both!
Regards,
Steve