Was surfing around on another forum and came across this. Don't know if its a repost, but will take that chance since this is such a heavily debated topic on this forum. Comparison of both cars on the same day with equal drivers.
http://www.webridestv.com/showvideo.aspx?video=79736
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2014 Viper TA - Stock - 11.43@132.37mph, 1.95 60'
08 ISF - headers/exhaust - 12.25@117.78mph, 1.96 60'