Isn't the turning rotation of the regular 370Z shorter than the Nismo? It could explain why the regular 370Z can turn better. Also, the Bridgestone tires are supposedly better too.
Anyway, I hope both cars get a huge massive upgrades as I might get a 370Z at the end of the year depending if the cars are getting upgrades to compete against America's pony cars.
ps. Nismo should get an automatic transmission. Why not satisfy both parties?