I didn't do the proper calcuation to get it back to the American system because I just saw the stats on HBO. But it's 66 cm for Mayweather and 63.5 cm for Mosley.
This content is protected Mosley is a little taller and rangier. Most stats, other than weight, are unreliable.
If there's a difference in favour for Floyd, it's probably in the fingers. Anyway, Mosley is broader, so if he'd use to full length of his body, he'd outrange Floyd. But it's not a big enough advantage to really... be an useful advantage. Still... no more bigger man for Floyd going into this fight. Staying out of range will require him to move in and out. Against Marquez, he could just potshot from distance and at most lean with his back. Marquez couldn't reach him.