First off, this beat is total boss.
Fats V1 - I think you ride the sticky/shit/piss bars way too long, nice delivery though.
Mao V1 - Intro is hilarious, I like how you counter Fats' aggression with a childlike innocence. Get off my knob is a solid flip. Black hole is a little hypocritical as a follow-up though. Rhyme scheme is pretty tight. Fifty layers of ugly but could have been used against anyone.
Fats V2 - Only weapon is your breath is nice, ogre flip is nice, mumbling diss could really go either way but overall I think both of you are a lot more clear here than I've heard you before.
Mao V2 - Damn, there is no way I could break down all of the punches in this verse. Holy shit. That said, the reference flip and touching on diction are really strong lines.
This is a really tough one. There were a couple really good punches, and a lot of mediocre punches that had really good delivery/rhymes. I'd have to say Mao edged it, mainly due to Fats' lack of hits in his first verse.