They should be used in concert. If you have a set of poses/morphs that you like but want to fine-tune, fiddle, or try other poses, then you want to Edit->Memorize->All or ->Figure. If or when you want to restore that memorized pose/morph set, just hit Edit->Restore->All or ->Figure. If you haven't memorized before selecting restore, you'll get the base figure in base pose. Simple as that.