Well, yes, you should have, but eripmavs are noticably NON-equivalent. They are thematically related, but they are still a template (although someone could make a class version of them in theory), and they are a "good-guy"* version with a lengthy mechanic or two devoted to making them feel that way.
*Or at least neutral guy.
In short, there is room for both in a single campaign without feeling too redundant.