I haven't seen Phil since last Mr. O. If you see them in person, you'll see the size difference....CLEARLY.
Phil gives the illusion of being alot bigger than he is especially with his arms being as big as they are.
Kai is just big. They have very different frames. Phil adds 10 lbs of muscle and you really notice it. Kai not so much. BUT Kai has a very dense and mature look to his muscle while Phil has a plastic look.