As an Arguello fan, I respectfully disagree. Bradley wins this purely on size and strength advantages.
If 12 rounds Bradley by decision, if 15 Arguello by KO. Body punching is worth it's weight in gold in a 15 rounder and Arguello's uppercut would really take it out of Tim over the distance. Tim was as tough as tough gets but I think Arguello finishes him if he has his customary distance.
He had the skills but sometimes just got sucked in to those brawls where he took quite a punishment, especially in the Provodnikov fight
I'm taking Arguello by decision because Tim is too quick to jump in to a brawl. I say decision though, because I rarely pick a fighter to get knocked if they never have been.