As for fighting style, sanji wins, i could never connect to Zoro's sword fighting... and somehow, i prefer sanji's knife non-killing style than zoro's flying pheonix attacks.

but for pure badassness, zoro takes the win, he has a good combination of being 'samuraian' (not a real word) and being a tactician (a real word, just with spelling mistakes).

though, both are really great.