I don't think he'd last very long. He's probably no going to get starched as quickly as he did against Pacquiao but everything about his style is wrong against Duran as there is nothing he does better and he can't just change his game when it's not working. I think he lasts a max of 5 rounds.
Ricky had brilliant footwork, a wicked body attack and a very good chin in his prime. He definitely goes rounds. I think 8-10 before it all gets too much for him but I wouldn't be surprised if it happened sooner.
I think 8 sounds more realistic than 10. I think Duran ends it with a body shot, similar to the one that KO'd V.Fernandez.
I see Hatton landing a miracle haymaker and getting Duran out of there. Probably around the 5th or 6th round.