Knowing the difference, and knowing how to tell if a Pokemon card is fake, matters if you plan to sell Pokemon cards or even sell comic books alongside your collection.

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When played, this card allows the player to exert up to 2 of their opponent's characters, meaning they won't be able to ready up at their next turn
Flickerwisp can target any permanent, so you can even get rid of your opponents tokens or target a land for it to come back untapped during your end step
These cards are especially valuable against planeswalkers and problematic artifacts
And as you are guaranteed to get the other when you play one then as a whole they are stronger