I think its who fought better in round because in some cases one guy can land one punch that is more devastating to his opponent then every punch the other guy landed, but I still don't consider that one punch to be worth 20 clean punches from the other guy. If Cotto or whoever lands 10 clean punches that should stand for more then 5 clean punches landed by his opponent, but that his opponent land that effect him more.

The actual rule is clean punching. I checked it up, and effectiveness has no part in it. Thus even more Cotto wins those rounds becuase he landed the far cleaner punches. Which also would have Hopkins ahead against Calzaghe, which I had. Mayweather way ahead of Oscar which I had. Effectiveness isn't a fair criteria because one guy will always be effected more than his opponent by the punches, but if he lands more perfect punches there is no reason he shouldn't win because his opponent has a better chin or more power. Whoever lands the most clean punches does deserve to win around unless his opponent lands nearly as many punches, but wins every other criterion.