When I enter my Viper in a car show and it's the only Viper there, I know I'm taking home the 1st place trophy.
If I had a GTR and entered it I know there would be about 10 ricers there taking the trophy home before the GTR.
Not comparable. Think of the GTR as a fast on rainy days or snow racer as that's where it would beat the Viper, just like my Stealth does. Although my Stealth compares well to a GTR (same weight, hp, AWD and hp) it doesn't compare to a good Viper. The hp delivery doesn't compare to the hp delivery of a V10 at all.
But, my Stealth is definitely fastest during winter, while the Viper is parked. That's why I plan to keep the Stealth, because it does the 'normal' things that a Viper can't do well.
Ted