Manny will run into not just counter punching, but speed, power, experience, body punching (Ask Hatton bout that). Mayweather won't be sitting in front of Manny waiting for him to break him down. Mayweather is faster than Manny on a slow day. He'll tie Manny up before he lets him assault him. I'm a Manny fan, who has watched him improve every fight, but unless Mayweather got old overnight like De La Hoya did, he would be overmatched. Floyd won't head hunt Manny because his body will be wide open as he walks him down, and he's way too good of a defensive fighter to let Manny rough him up on the inside. yall bein fooled into thinkin he can beat Mayweather based on the De La Hoya fight, and this is the same reason Mayweather might be tempted to come back and destroy him. He's the perfect fight for Mayweather.
And for Judah, he also gave Cotto fits before he ran out of steam. If he took his conditioning seriously, he would have given any fighter problems, but later in his career he didn't so that's that. End of the day, he did give Mayweather fits until Mayweather adjusted and started to go to the body, and then Judah was a sittin duck.