They are worlds apart in a monetary sense, but MMA hasnt been spoiled by money (yet) , boxing has, period.
As two disciplines, mma will beat boxing hands down. The ufc was started just to see which discipline was the best and its been proven that to be trained in multiple martial arts is of benefit.
ps i dont think bisping will get past anderson silva either. He has got to be, pound for pound, the hardest man on the planet.