Lara has never been clowned and trashed like Broner was. I'd say Lara is the better pro All his losses are disputable But I'd agree that he didn't do himself any favors in the fan department in that Canelo fight.
I see them on similar level, good, probably top 5 in their divisions but with flaws which hinder them becoming "the man" if nothing funny happens. Lara lacks offense but is pretty strong defensively and Broner lacks defensive skill and movement.
Lara is better at every aspect of the sport except weigh in trash talk... And that doesn't count in the ring..
Lara still fights like an amateur, as you can see vs canelo it didn't pay off. If he put some hurt on Canelo the judges wouldhave been in a tough position but Lara fought like an amateur and didn't really control the fight. He just punched canelo than ran around like a sissy. AB isn't as technically but he's tried to whoop every one of his opponents asses so far. That's what makes a good pro,