I’d argue a pretty big distinction between this and the Predators one. There is not an award for “regular season conference champions.” And to my knowledge, no team had ever hung a banner to that effect before.
Unlike the Rangers one, there is and has been an award or at least a title for this for nearly a century, many teams have previously hung this exact banner, and all 18 teams that have won the award recognizing the achievement since it was created have hung a banner.
So again, seems to be a “dump on the Rangers” thing. Unless we really want to stretch equivalency to the extreme/farcical.