My Z06 "rode harder", but it felt way better on bumpy roads because while it was stiff, it was well controlled. The 370Z is all over the place.

The 370Z needs a drop - Swifts (or rather, the spring rate and height of them) should've been standard.

I do feel that in some regards the 350Z, despite being rough as f*ck, exhibited just a tad less roll than the 370Z stock-for-stock. The 350Z's steering was also heavier and a tad more responsive, as a result. But again, it doesn't take much money at all to get the 370Z to where it's supposed to be - which is what makes it such a great car. It starts off with the right compromise of comfort and agility, and you can take it and fine tune it to your liking. It is a proper tuner car in that respect, as it does not break the bank. Not in my opinion, at least.