How else to compare fighters from different divisions? Just 'cause it's a difficult concept to grasp for some, it doesn't mean it has no merit. You take fighters from different weight categories, and you boil them down to a few common denominators. Dominance in their weight... quality of opponent... ring generalship... power... chin... heart... fan-friendly style... etc. And no, you can't just imagine a 220-pound Mayweather with all his speed and agility in order to compare him with Wlad or any other heavyweight. It doesn't work that way. A heavyweight will rarely, if ever, match a lightweight in hand speed. Physics. We'll always want to compare, so until someone comes up with a better concept than p4p, that's good enough for me.