It's really not that debatable. I'd love to hear your arguments though.
I've said them many times. Just look at the team's record when they are out injured.
Last year:
-53-22-7 (113p) overall
-Dumba 39-13-5 (119p pace) with / 14-9-2 (98.4p pace) without
-Spurgeon 41-19-5 (109p pace) with / 12-3-2 (125p pace) without
18-19:
-37-36-9 (83p) overall
-Dumba 17-13-2 (92p pace) with / 20-23-7 (77p pace)
With or without Spurgeon playing, for his career, the team has had a roughly the same p% in it's games.
Dumba has a bigger impact on the team winning or losing than Spurgeon.
5v5 aToI:
21-22: Dumba +3:05 (both out a lot of games)
20-21: Dumba +1:16
19-20: Dumba +1:17
18-19: Spurgeon +0:11 (Dumba out for 50 games)
17-18: Dumba +0:37 (Spurgeon out 21 games)
Dumba has been used more 5v5 than Spurgeon for years.
PK aToI:
21-22: Dumba +0:02
20-21: Spurgeon +0:08
19-20: Spurgeon +1:21
18-19: Spurgeon +0:49
17-18: Spurgeon + 0:58
Dumba has closed the gap to even usage on PK (19-20 his game was just off at everything).
Spurgeon gets more PP time (not even worth comparing), but I really don't want either of them on the PP. So that is a wash for me.
Dumba is 4 years younger and is currently (and should be on his next deal) cheaper than Spurgeon.