Floyd would get off and get out of the way, Clottey has the wrong skillset to catch Floyd. He'd be chasing all night and very rarely finding.
I dont think Clottey would be as defensive against Floyd because of the pace of the fight. There won't be exchanges he is used to and he will be forced to pick up the pace and let his hands go when he realizes he is getting blew out. That being said he just not on the level of Floyd who will easily lure him into his fight pace and have Clottey trying to outbox him which he can't do. Like everyone else have said i see a shutout for Floyd.