In Tribal Elf decks, or unknown playgroups where you have no idea what you'll be up against, or you reeeeally want to get maximum value out of your Skullclamp, Reclamation Sage is better
Blue decks that love casting in the opponents turn are going to love this, because she can get to drawing you 3-5 cards on attack in no time at all
Smaller size to fit an Ultimate Guard Boulder deck box, which makes it about the same size as a sleeved card, with the tab on top sticking up
But there's nothing saying you can't put both of them in your deck at the same time for maximum punishment.
Ideally, you should discard Electric energies because you can use Eelektrik BLK 31's ability, Dynamotor , to get 1 Basic Lightning Energy sv1 257 from the discard pile and attach it to one of your benched Pokmon