Maidana fought Broner at his natural weight (he was a cutting specialist who bullied much smaller men in the first half of his career at LW & SFW) and Mayweather about 2-3 divisions above his natural/athletic peak weight.
Mayweather at 130 had potent power, Broner looked small even at 130 & should have fought at 126 or 122 instead. He moved up depending mainly on his chin (the base of his boxing package), if you have no chin you will get KTFO with that boxing style Mayweather Pro Debut [YT]VldHEpDxh8A[/YT]
Floyds fists hit womens faces harder than Broners but Broners tongue rips harder into strippers cvnts.
Sir Broner had less muscle % as a prospect, he looked the same size as Mayweather at 130 (except Mayweather was more muscular at weigh ins), Broner like other fighters like to gain as much as possible after weigh in, while Mayweather likes to gain whats necessary Its possible Broner start going on a weight gain program starting from the pro Debut (where he was a small 130 as in muscle), then he gained enough muscle/bone mass to the point he can't make 130 Today Broner is possibly bigger built than Mayweather, because he went on a more aggressive weight gain program, while Mayweather was very careful slowly adding HQ conditioned muscles as he moved up.