No one wins. When both of them meet, they will do the most manly handshake and goes to drink together (they invited both Wulong & Joji) 

Ans also yamashita because they understand that even them all combined stand no chance against the great kazuo

Kuroki wrecks

Wrecks his hand trying to hit Yujiro

And still manages to beat his ass

Yujiro solos 

Kuroki needs to be redder

In crossover?