What the argument seems to come down to is P. doesn't consider the third film to be true canon, he considers it unworthy of the first 2 films. And thats fine. I think he should just say that from the outset though.
Even if, under intense scrutiny they don't appear to be bigger or stronger its pretty clear we aren't meant to analyse them to such a degree, but simply accept what they 'say' in the film - that the Super Predators are bigger and stronger. One is meant to assume that the Classic is the same size as the original predator and, however much bigger than him the Berserker is, is meant to be the in-universe size difference. And thus, if Hot Toys are basing the sizing of the figures on the in-universe stats, one can view the Hot Toys figures as too small...but then all their Preds are really.
