We'll call it welterweight. I like The Duran's slightly better defense & shorter punches to earn him a close decision, but hat damn, this'd be one hell of a sexy fight. If they fought 3 times I'd have to expect them to be split.
Would be a great fight, but I don't expect Napoles to garner so much as a single vote. On almost any forum.
Great, great fighter, & never quite getting the praise he deserves. However, familiarity will always win out if it's close. & Duran is familiar ground for everyone.