Floyd at 135-140. Prime DLH at 147, close decision for Floyd as he sweeps the later rounds in which DLH fades.
Floyd at 135, where Oscar was deadly, but a little too green. Oscar peaked at 140 and I believe he would overpower Floyd there. Could see them splitting fights at 147.
Floyd EDIT - at 140 it's close to a 50/50 affair. Oscar was really a fantastic blend of speed, power, strength and skill there. I still think Floyd is a little to smart and adaptable for a guy so 1 hand dominant, but it'd likely be razor close and contentious.
its a good one at any weight, but the higher in weight they go, the better I like Oscar's chances... but at 135, for betting certainty, I think Floyd would prove his master... just a bit too quick, too defensively cagey and difficult