I actually have both these cards! Unfortunately, neither are particularly good; the function of them is too facilitate atticking when you are screwed for energy, either by providing a low energy attack, or by allowing access to previous evolution's low-energy attacks. The only other reason to use Recall is to access a BETTER attack from a prevo, but if that is the case, why did you evolve it?
Either way, these cards are designed to help you out if you are in trouble. The problem with them is, though, that a well-designed deck shouldn't actually be in trouble ever, making the use of them rather pessimistic. There are far more proactive trainers to fill these slots, imo.