By wider track I assume you mean the width of the rims?

If so yes.

Sport rims: Front - 9" Rear - 10"

Nismo rims: Front - 9.5" Rear 10.5"

And if you mean, the actual "track" of the wheel base, no they are the same for all 370Z models. But like LMBmikeZ mentioned, the wheels are wider than the other non Nismo wheels.