The problem with that, is attributes are affected by size/weight. Loma has skills that any fighter above a certain weight could never possibly have, and if Loma was 240 pounds, wouldn't have himself due to the constraints of the human body. This is why some people say p4p lists favour the lighter weights. They do.
It all depends where you're setting this arbitrary "same weight". If Loma and Joshua both weigh 130, Loma schools him. If Loma weighs 250, the constraints of the human body take away all of what makes him so special - Joshua smashes the shit out of that Loma.
I like p4p lists. They're fun to discuss, and they bring attention to the less fashionable weights. Are they worth anything though? Not really.