Bullitts were not built to be the end all performance Mustang. But when you look at the list of perfomance parts on the engine, suspension, tranny (3650), brakes, exaust, seats, etc. I beleive that the Bullitt has a great bang for the buck, and a there in lies THE significant difference between the GT and the Bullitt. When I bought the Bullitt, I drove an 01 GT right before, it did not hold up in cornering ability, poping your neck back with low end tourque, or shifting (and yea I know the GT eventually got the 3650). Not to mention the looks. All out balls out you will find that the Bullitt will edge out the GT just as the Cobra will edge out the Bullitt. Sure you will find exceptions but not many.