Is the aspect of a Demon Lord/Archdevil/Elder Evil/etc the same situation? A separate "super-herald"?

Would it be accurate to list their levels of power (assuming the same original entity) as Avatar/Aspect/Proxy in descending order?

Does an Aspect have the memories and knowledge of the original power, even if it knows it is an aspect? Would this be an appropriate set-up for some sort of "clone doesn't want to be re-absorbed" plot, or is there a level of mystic subservience in place?