Floyd, but to what to degree is uncertain. I'm positive Loma wouldn't be completely dominated like Chico. He's too talented for that. But I'm definitely not ready to say Loma pushes him to the limit or wins. You can't put Russell, Martinez, and Walters in the same universe as Floyd. Floyd 8-4 seems about right.
Mayweather via clear UD. Loma wins a few rounds, but Floyd has a clear advantage in size, speed of hand and foot, and at 130 at least, POWER. Floyd would keep Loma at bay.
I would pick Mayweather by decision in a prime for prime match, and even a match now where Loma would be FAT at 147
Magus can pretend Lomachenko is a nonentity but the fact he is posting in numerous threads regarding him says otherwise. Anyway, I think this is one hell of a fight. I'd pick Floyd as IMO he's the best 130-pounder of all time but make no mistake about it, IT'S A FIGHT. I would genuinely love to see how Floyd works out a guy who is as technically sound as Lomachenko, I don't think Mayweather fought anybody with that kind of skill in his career.
The reverse is also true, but even more so. Mayweather was a Savant. Ridiculous talent. Loma hasn't fought anyone even 50% as talented. Mayweather, however, has fought Canelo, Marquez, De La Hoya, Judah, Pacquiao and a few other guys that have comparable skill to Lomachenko.
Oh I agree, it obviously goes the other way too but that's a given. As great as those guys are, I don't think any of them have the boxing IQ of Lomachenko.