I would favor Broner over Valero, because he is too athletically gifted and skilled to let a guy stand in front of him with his hands down, and not punish him. Also Mosquera was somewhat primitive in his boxing skill, but he put Valero on the canvas. Broner is much more athletic, and powerful than Mosquera. I think it would be a beat down. Valero goes down at about the 1:30 mark [ame]http://www.youtube.com/watch?v=KOBt9OKf6yE&feature=channel&list=UL[/ame]
It only happened a year ago. What's broner done since then? Ponce is still the best fighter Broner fought, you do realize this?
Mosquera is better than anybody Broner has fought period. That being said, I would favor Broner. I am assuming of course he has some mental toughness, and wouldn't wilt when he found out that the shoulder roll doesn't work as well against lefties.