Track test scores

Does anybody know where I can find the results of any 350Z track tests. More specifically, one that compares the performance results of the Touring, Performance, Enthusiast models vs. the Track model? I want to see if the stiffer suspension in the Track model actually improves the slalom times and things like that, or if it's just for perception. "oooh, it's stiff, it must handle..." Same with the Brembos. Do they actually significantly stop better than the standard brakes? They definitely look cool.

I need to pick which model to get. I really want leather seats, and if the handling and braking is the same, I'll go with the touring.