If I had to bet on this, I'd go with Marquez since he is the (super)naturally bigger guy and more proven whereas Broner isn't even a lt. welter yet. Broner looks promising enough so that perhaps one day he will turn the tables and even now he would have a shot
Marquez uses his naturally obtained, totally legitimate, innocent, pure, completely legal physique and sudden Rosarioesque punching power to demolish Broner
mythical matchups is the place for this since arum is still alive and refuses to work with haymon/golden boy
Woulda been a better MM if it was against the LW prime version of JMM against Broner. That would have been an awesome fight. I would lean towards the more skillful JMM in that one.
Marquez survives a scare early on...then goes on to beat the living shit out of Broner.... lifting Broner skirt...taking a peek seeing a vagina...he mercifully finish him.... Marquez by TKO 11
At marquez's age, this would not be a bad fight. Broner would be much faster. Jmm would need to outsmart him which of course he could but at his age it would not be easy.