Pac will have some success early on in the fight. It'll take Floyd some time to measure Pac up since Pac is fast and likes to come in at weird angles, but by the 5th or the 6th, Floyd will start timing him right and hit him with some clean counters. Once Pac starts thinking, the pace of the fight will slow down and Floyd will start to break him down. The reason it could be a close fight though is because Pac will probably get desperate and steal a round late into the fight because of his work rate.
Yep. That pretty much sums it up. I expect to Floyd win by at least 3 to 4 rounds, but we all know what can happen to any aging fighter. Any given fight, they can suddenly become "old" and lose what makes them special almost instantly. Just ask Roy Jones Jr.