okay. ive own both in the past 6months and this is what i have to say.

s2000: ive always been a honda guy and s2k is nice shifts so well top down ladies love it. its very small but its something i can bare with im only 5'8 160lbs. gas was pretty good low 20s in city. very fun to drive

g35 coupe: i have 6spd MT very luxury heated seats ftw during winter. navi =). doesnt drive like a fackin honda. pretty horrible on gas i fill up 1/2 every 3 days dont drive that much. doesnt handle as well as an s2

both in common: chick magnet. i think i would go back to an ap2

common