Kai can look how a bodybuilder should look with the insane mass. He just carries it well, his physique flows, he has lines, his transitions show all 3 dimensional looks of the muscle. He is a classical bodybuilder with a shit ton more mass (Id like him to pose different though)
The other top tier guys just dont carry it well. Jay is like a stone, he can barely twist, he is so rigid... He cant transitions well, get on a knee, twist his waist and tilt at an angle while flexing his triceps, lower back and calves. He has no flexibility. He is a pure comparison type physique, get your mandatories down with a shit ton of mass and you can make it up there. Same go's with Branch, shit physique, no flow.. Obviously I respect the hell out of each and one of these guys, they work their fucking ass off. But they just have no flow, they don't carry the mass well. Phil is a pump up balloon, his bellies are "pretty to look at" to a lot of fans and gym rats because they have tons of POP. But he just doesnt have the frame to hold the mass well. And he doesn't have the dense hard muscles, like I said, a pump up ballon!