Re: Best victory in a rematch?
The Pacquiao-Morales trilogy.
The first fight between the two isn't a particularly close one, when you consider that Morales still won an easy decision after gift wrapping Manny the 12th. I STILL scored it 8-4 for Morales, and had he fought that final round seriously, he'd have likely wound up with that margin in the official win.
In the rematch, Manny started fast, Erik responded well, and then Manny blitzed him in the 6th. Spent the remainder of the fight dominanting him, beating him up, and then conclusively stopping him in the 10th. Morales won 2-3 rounds in the rematch, tops.
And then, in their rubber match, he was manhandled and stopped in three.
Oscar Larious came back to dominate Israel Vasquez in their second fight and stopped him, after getting knocked cold in the first meeting, in the first round. He lost the rubber match via cuts and did hit the canvas, but was not getting dominated, so I still think this applies.