IIRC, it's completely cosmetic--you can purchase other characters from the console game to play as, but they're mechanically identical. There may also be someth

IIRC, it's completely cosmetic--you can purchase other characters from the console game to play as, but they're mechanically identical. There may also be something to unlock later levels without playing through earlier levels first, but I 100%ed the game without buying a thing and it never felt unsatisfying or grindy.