Right, but at the same time of their careers:
Iginla - Totals: 626 GP, 250 G, 253 A, 503 PTS - Playoffs: 28 GP, 14 G, 10 A, 24 PTS
Matthews - Totals: 562 GP, 368 G, 281 A, 649 PTS - Playoffs: 55 GP, 23 G, 25 A, 48 PTS
Matthews has scored 118 more goals and 146 more points in 64 less games.
Matthews received Selke votes in 2017 (38th), 2020 (16th), 2021 (27th), 2022 (10th), 2023 (14th) and 2024 (3rd).
Iginla received Selke votes in 2002 (14th) and 2004 (34th). Iginla would also receive votes in 2008 (48th), 2009 (35th) and 2012 (43th).
I know Iggy is more physical and harder to play against, etc. but it's hard to ignore Matthews offensive production is much higher than Iginla's, plus he's reached as high as 3rd in Selke voting over Iginla's peak of 14th.