You can hunt the threads here which go from saying that Domestic Premium Rouge is literally worse than being waterboarded to my opinion that its not any more different than the difference between ML J in a 320 vs an E170 (except for the arguably better iPad). The food & drink is identical.
Ignore the people who try to compare ACr J to Emirates first class bungalows. I expect them to show up anytime.
It is a significant enough change you could get it changed. If YEG-YUL was pods, I would get it changed.
Recliner to recliner, I'd not waste the phone call.