We'll see when the car is "properly broken in" (according to Car and Driver...I'm snickering at that, by the way).
The truth is this - gains will be MINIMAL, and the difference in things such as Auto-X will come down to the drivers. The only POSITIVE gain that was even noticed (thanks to the motor not being "broken in") was the skid pad, being .99 instead of .98g's. To which they say: "That betters the stock Z by a tenth and is
most likely attributable to those Yokohama tires." Read: get better tires on the base Z, and it'll probably perform as well.
Look, I know whats going on here - you guys are in love with the new Nismo, and that is perfectly fine. For some reason, you're insulted that I (and MANY others) don't find this car to be worth it. But don't sit here and make it seem like its so much better (like, $6000 better) than the 370Z, when it simply is not. Its a collectible, and again, thats just fine and dandy. I like doing work on my own car, and the Nismo isn't for that.
So, if you are willing to fork over an extra $6000 for a car that performs practically identically to its cheaper brethren, then by all means - buy the Nismo. Its your money to spend, not mine. I just have an opinion, as does everyone