They both say they want to fight in that weight class. I'm not saying its gonna happen but if there's two decent fighters at 147 then they should be compared. If Bradley could pick up a belt at welterweight (the IBFs held by an unknown) then why not? Bradleys a snappy little fighter, maybe he could get in and out with quick, little combos for a while? I've seen people writing crap like 'Mayweather v Calzaghe' or there was a thread recently about extreme catchweights for example between a light heavyweight and a welterweight at 160lbs. Who would've thought about Pacquiao v de la Hoya, de la Hoya v Hopkins, Mosley v Wright, Wright v Hopkins etc, a few years before they happened and I'm sure there are better examples.
What if they were in the same weight class then? They both say they want to be at 147. What if Williams drains to fight again at 147 and Bradley takes a fight there?
I wouldn't count on Bradley getting a belt at 147. He's just small. And we saw in the Holt fight, can be put on his seat by guys his size, let alone guys much larger who may enter the ring as JrMW's.