They are both great players and right now I think Matthews is better. However, I personally haven't seen a more cerebral player come into the league in recent years than Pettersson. His hockey I.Q. in relation to his high end skating and shooting abilities is unmatched in my opinion. I believe that over the next 5 years Pettersson will be the player, not Matthews, who could challenge McDavid for the crown as top overall player. I personally don’t think he gets there, McDavid’s skill is just a step above all of the other top end players including Pettersson, but I think he makes it interesting because his hockey I.Q. is on another level.