I've never played Uncharted series and my friend refused to buy it, so I didn't get to experience it yet, so can't really comment. Besides neither of the games are out for a good solid 6 plus months period, so the comparison, at the present is void. The question should have been "Which one do you think will be better?" or perform better sales wise etc. Imo.
Disconnect and self destruct, one bullet a time.