Auston Matthews is obviously a great talent, but I would worry a bit about him being a showman. He has more of an NBA player type personality, where he is worried about his image, for example his GQ spread. A few of his goal celebrations are suspect as well. This tells me he might put himself above his team and that's a bad sign going forward. On the other hand, Pettersson is 100% committed to his team and his own game. He would never do a goal celebration that was an add-on to the initial emotion of scoring a goal or doing a look at me photo-shoot for a fashion magazine , because he knows it would make him look foolish and immature. It's for that reason that I suspect that in the coming years Pettersson will establish himself as the better player.