Petey is a hyper modern player-type into fashion, solitary scooter rides, and social media clout-chasing. He's a skinny, quiet guy who simply can't hang with the typical North American locker room antics and dick-swinging.
JT is an all-American asshole with a bit of an anger problem. We don't really have jock Chads like him in Canada, so it does come off pretty abrasive. But he's not too dissimilar to a lot of NFL or NBA players.
Neither one is right or wrong. But it's become clear that JT saw things he didn't like early on, and Petey has not improved those things. Most likely related to his dedication in the gym, and being a more involved leader for the team.