Mosely has the better resume, was more consistent and competed against a higher level of opponents across his career ... but I think Tszyu spent his whole life waiting for a moment like this and would have saved his best for an opponent like Mosely. The Tszyu that stepped into the ring against Gonzales is what I consider prime. That Tszyu (Gonzales was stopped and later said De La Hoya's power, whom he had previously lost in 12 rounds by decision, wasn't anything like being hit by Tszyu) showed probably his most complete fight, hooking off the jab, the big right, some brutal bodypunching (if anyone knows Tszyu's career well, I'd be bold enough to say his bodypunching is as brutal as anyone you can find around 140 ... it's just he rarely used it) and a bit more movement than he showed in later fights. So I take Tszyu ... in the fight that he really needed to get on his resume to earn the respect he isn't always afforded. Under-rated in talent but underachiever in accomplishments...his own fault of course. It means on paper it is hard to definitively pick him, because it's almost inevitable that someone will mention the Phillips fight, or even Hatton. But having watched nearly every fight of both fighters, it's Tszyu's BEST performances and not his worst that make me think he could win this.