Petry is now the comparable to Klingberg? Interesting take! Petry is not even in the same discussion as Klingberg. Klingberg is for sure going to get more 8mil+ and is in no way similar in any aspect to Petry other than they both play in the NHL.
4 years in the difference is the biggest difference (age 29 vs 33). Look at the numbers over the last 3 seasons below. I do agree that Klingberg gets more AAV than Petry but it's not a massive gap like you think it is... in terms of production on the ice. It's more to do with age and how Petry wanted to stay with the Habs when you compare to the next contract Klingberg gets.
Petry:
* 208 games played
* 23:12 TOI
* 36 goals
* 128 pts (0.62 pts/game)
* 38 PP points
* 55.6 Corsi for with 55% D zone starts
* 5.76 hits/game
* 3.25 blocks/game
* 3.63 giveaways/game
* 0.98 takeaways/game
Klingberg:
* 175 games played
* 23:11 TOI
* 23 goals
* 113 pts (0.65 pts/game)
* 54 PP points
* 57.2 Corsi for with 38% D zone starts
* 1.77 hits/game
* 2.97 blocks/game
* 2.97 giveaways/game
* 0.99 takeaways/game