P4P is a bunch of nonsense but fun. It's nonsense because fighting styles do not translate in weight. Lower weights = punchers, higher weights = boxer generally because Chin is linear while punching power is exponential. When you get to heavy weights.. even the shittiest of boxers can KO anyone. It also favors the lower weight class for example: Take Inoue... Fast as ****, accurate, granite chin, and loads of punching power... Multiply him up to 200lbs.. got this in incredibule Hulk looking monster. Now take Tyson Fury, incredible boxer, accurate, granite chine, and decent punching power.. Subtract 200lbs from him.. you got this 108lb 6ft weirdo... lol That being said... Currently Inoue would have to be #1 since he went up in weight and dominated the top champ there, while Crawford can get it by simple fact of being undisputed in 2 weight classes, not because he's beating another welterweight in Spence.
Bud has better fundamentals than Fury and doesn`t hit and hold, Fury wouldn`t be able to use his weight at 160, headlocks don`t drain legs at 160.