A Viper is 1200 lbs less than a Hellcat and only 60 hp off.The thing about the Hellcat though is that you can walk into your local dealer and buy a 707 hp beast that (with a skilled driver) will do a 10.8. That by itself is pretty cool. Are there faster cars, yes but not ones you just buy off the showroom floor especially from Dodge. My only question is why will people by a Viper than? The current viper has a V-10 and does not put out the power of the Hellcat V-8 and most likely will cost less.