Assuming Hatton is able to connect, weight class and power behind his punches then yes he is the biggest and most powerful Pacquiao will have faced inside the ring. Oscar was only 142 at fight time and wasn't able to land anything flush so while he would have been the biggest (not the tallest). You have to remember more power comes with more weight behind it. Had Oscar not overtrained his weight he would have been the biggest. My guess is he was afraid of that 3 million per pound clause over the limit.

Only way Hatton wins this fight is he can get in close otherwise Hatton gets outboxed and out punched. Expect Hatton to come into the fight around 150lbs and Pacquiao two or three pounds less than that. Although there is a good chance Hatton makes the same mistake as DLH and overtrains. I read he is planning 13 weeks training.