hi guys, is there any cosmetic difference on a 00 s4-to 02 s4 ...for example are the head lights the same?

 

No cosmectic differences like you mentioned, as far as I know.
other than different badges.

 

different badge... but you know.. IMO, and i might just be visually impaired.. But i swear it is ever so slightly different looking. the older ones seem to be flatter to me if that makes sense. I have no actual proof of this or anything to go off on.. but it does seem slightly different.