The difference is incredible. However there is turbo lag and it takes up until 4500 rpm for full brunt of the turbos to kick in. Once they do though it is very impressive. My 1/4 times at 14 lbs of boost on street tires with a reaction time of 1.1 seconds was a 12.9 at 120 mph. I figure once I learn how to drive properly and get some slicks hi 11 is not out of the question.