30 April 2015 Last updated at 11:36 BST
But which fighter has the biggest online punch? Whose bank balance hits heaviest? And who has the flashiest fight gear?
BBC News presents an alternative take on how the fighters stack up.
Video Journalist: Paul Ivan Harris
Fight fans have been comparing every stat of Floyd Mayweather and Manny Pacquiao's boxing careers ahead of Saturday's super-fight.