I remember Broner saying that he has to spar junior and middleweights because welterweights can't take his shots. We will have to see on that. I think his power will carry but not as devastating.
I don't think it's possible to be the same. it'll be less but don't use the Paulie fight as gauge, he has an iron chin, pime Cotto couldn't stop Paulie and Paulie was busted since the first round! Paulie is a tough muther****er, if he KO's Paulie that's huge. TKO is more likely but if he actually flattens Malignaggi he'll be the only man to have done so.
Golovkin can KO guys from 2-3 divisions above as easily as if they were the same weight but then again, Broner is not Golovkin. His power wont be as effective as before