Prime-for-prime I see Shane being competitive, but dropping a UD to Curry. The Cobra wasnt as fast as Shane, but he was ALOT better technically, and more accurate. At his best I see him countering between Shane's fast combos, and hurting Mosley. Shane would have his moments due to his speed, and heart, but I think Curry outboxes him for the majority of the fight.
I don't know. The thing with Mosely is that he's definately a guy that scores upsets. And he has the far better whiskers. Curry is just one of those "on top" fighters and he looks like a hall of famer when he's facing somebody where he is on top. But when he isn't on top, he looks ordinary and flawed and all of a sudden those weaknesses become huge. In a 3 fight series, I'd go with Mosely to win at least once. Neither guy is going 3-0 because the one time they didn't have their A+ game, they'd lose.