i think anderson could win only with a knockout.. no way he'd be able to beat roy in a boxing match, since I'm sure they'd box similar styles.. A lot of bobbing and weaving and ducking punches, and there's no way that Anderson does that better than Roy.. Silva probably has more power than Roy in his punches. And I don't think the gloves would make much a difference in his power or speed, it's not like he hasn't used them a million times before.
But I just imagine Silva as a boxer would be almost a clone of Roy, but not nearly as good, even though Roy's much older.
And the reason why I think it began to being talked, is that even though Roy isn't as good as Hopkins, he's a bigger name to the casual fight fan who'd be the ones buying this PPV.