I've driven a friend's 370z for a few days. Powerwise, it's almost just like the HR.

Sitting inside, the interior is classier and you will immediatly have a feeling you are driving a muscular/wider car as you notice way more pronounced body lines, bigger bulges on hood and rear fenders.

On the handling side, the Z34 feels a bit more refined. The steering feel is different.

But it is still not worth the upgrade IMO. The Z33 has way more parts to choose from which makes modding more fun lol.

And I would still go for Nismo Z33 V3.

 

I seriously considered a 370z a few years back, basically when i decided that the 350Z would eventually get turned into a dedicated play toy. Then i just decided to drive my Z as a DD till i had to have another vehicle. Glad i waited, needed something other than a 2 seater, not to mention something that can tow.