The two are very different players.
Cam was more refined as a passer coming out of college but never truly elevated his game beyond that (which was fine, he was a very good passer) and the same inconsistencies kept creeping up on him. Injuries changed his career, especially those two Denver games, and it sucks but it is what it is. I don't like the narrative he only had one elite season, he had multiple elite seasons and one of the best seasons by a QB ever.
Josh has had to refine his mechanics completely and has become a brilliant passer compared to where he was entering the league. I think he is more consistently dominant than Cam was but has yet to really reach that peak, though it's not THAT far off.
It's okay to appreciate both players for what they were/are without nagging on the other. Both should go in the Hall of Fame.