As much as I hope you're right because it would make for a better fight to watch while it lasted, the biggest strength Floyd has is his discipline and Boxing Brain. He's definitely "if it ain't broke , don't fix it" in recent years. Floyd will bide his time and pick Manny off bit by bit and in the second half of the fight he will dominate. He won't need to take too many risks and would be more than happy with a long points win.
I have to say though that I do think Floyd's power is underrated (as is his chin) and he is capable of KO'ing Manny.