It's a tough one. Really really tough, that's why I'm not planning to bet on it.
Floyd has problems with speed, Shane has problems with speed. It could easily be a UD for Floyd. But I'm not so sure. Shane seems to have the right mentality going into a Floyd fight.
Nontheless, he needs to be the sharpest Mosley of all time to beat Floyd.
If I had to bet, I'd wait to the weight in, and it would possibly be UD Floyd.