why not make them both as a collectors item owning all of them (such as snowmen) should give something and for those who can't afford crit slots they are being forced to give up doing eeither collecting or power crits.
anniversary crits should have a broken aura that does different things when all from the same set are in a rit together. like all the aramors gain def boost but only works if all the anni of the same type are in the same rit. hollows could have regen boost.
It'd be useful to be able to see how many crits you can have of a type on the crit page itself. like the little glow bar under the crit picture itself instead of only being able to see it when you're making rituals.