If you ever read their testing methodology, you would know they test on the same day(same weather, track conditions, same driver; usually their most skilled track driver) to eliminate these variables; that is the whole point of doing a head to head comparison test!
It looks like you convinced yourself that the GSR is a better performer, and thats cool; I just wanted to give some scientific info (car vs car) so we dont have to listen to unsubstantiated stories of racing on the streets.
You'll note that I'm not saying a Prelude(5speed) will win a race; that will obviously depend on driver more than anything.