What does JMM do better than Mayweather?

When thinking about this fight and weighing everything up I suddenly realised something that made my mind up in an instant. JMM is an excellent fighter, a very good counter-puncher, great heart and a credit to boxing. However when you take into account the fight weight and all other variables and qualities, I'm left thinking how can JMM win this fight? What does he do better than what Floyd can do? To me, power, speed, youth, athleticism, adaptablity, possibly even experience (at championship level) is all in Floyd's favour. I know boxing isn't always this simple but when looked at this rationally it's hard to make a case for JMM. If people disagree please respond I really have an open mind about this...