For perspective, Regan is 5'11.5", and Jay is 5'8.5".
Yet from this picture, you'd think Jay is 3" taller. Meaning, if Regan and Jay switched sides, Regan would probably look 6" taller, putting the top of Jay's head at around the bottom of Regan's ear, if not lower. And that would completely change the dynamic of this photo, and make the comparison radically different.
Leave it to Jay to purposely use that comparison. But two can play that game [see Big Ramy comparison below].
I applaud Jay for getting in shape, but to do that in bodybuilding terms requires damage to his health. It must suck to be a mass monster and lose your entire identity by going off death cycles, and feel life pressures to look that way again.
But oh well - pro bodybuilding is fleeting.