There is really nothing notable in size difference between Pacquiao and Hatton. It's pretty much even when they step into the ring. Even though pacquiao is coming up in weight from previous fights he's already a solid jr welterweight. Pacquiao will carry 150lbs walk around weight so I don't really see where you are getting 130lbs natural weight from. That was yester year and not today. So your premise is off. Hatton pulls off a win it will carry a lot of credit and nothing is lost due to size difference.