Quoting: edeangel84
Matheson had a better overall season, which is why I went with Pettersson
That's debatable. I have two sets of data that put Pettersson substantially ahead of Matheson this year and one set that says the opposite.
JFresh's player cards have:
Pettersson in the 76th percentile for WAR, 63rd for even strength offense, and 80th for even strength defense
Matheson in the 34th percentile for WAR, 26th for even strength offense, and 47th for even strength defense
Corsica Hockey also has:
Pettersson as the 42nd ranked LD
Matheson as the 68th ranked LD
Looking at on-ice goals for per hour (oiGF/60) and on-ice goals against per hour (oiGA/60), you've got an argument this year, but not over their careers:
2020-21
Matheson had an oiGF/60 of 3.4 (the highest of his career) and an oiGA/60 of 2.7 (the best of his career) which results in a difference of +0.7.
Pettersson had an oiGF/60 of 2.2 (the lowest of his career) and an oiGA/60 of 1.8 (tied with the best of his career) which results in a difference of +0.4.
Over his 6 year career, Matheson averages an oiGF/60 of 2.7 and an oiGA/60 of 3.2 for a difference of -0.5
Over his 4 year career, Pettersson averages an oiGF/60 of 2.8 and an oiGA/60 of 2.2 for a difference of +0.6
Over their careers, Pettersson has a slightly better oiGF/60 and a substantially better oiGA/60. He is also younger with a lower cap hit.
If I'm the decision-maker, I keep Pettersson over Matheson. I understand that you are choosing the opposite. Some of it comes down to preference. Matheson is much more exciting. There is no doubt about that.