In the spirit of the thread, comparing the same stats that I used earlier
2017-2018 TOIQoC @ ES
Kadri - 29.78
Eichel - 29.6
2016-2017 TOIQoC @ ES
Kadri - 29.61
Eichel - 29.37
Points
2017-2018
Kadri - 55 in 80 games (.688ppg)
Eichel - 64 in 67 games (.955ppg)
2016-2017
Kadri - 61 in 82 games (.743ppg)
Eichel - 57 in 61 games (.934ppg)
Corsi rel
2017-2018
Kadri - -2.21
Eichel - +1.47
2016-2017
Kadri - +.96
Eichel - +.53
On PPG alone, I'm quite happy to say that Eichel is the better player and then when we add in the fact that he's 21 years old and hasn't even close to peaked, I'll very happily declare him to be the more valuable player by a mile AINEC. It's so not even close that it's pretty ridiculous to be honest.
I also completely reject your premise that Kadri's contract makes him more valuable because Kadri's contract won't make him more valuable than Matthews either, who I expect to make more than Eichel.