All have their strengths and weaknesses: Urza, Chief Artificer is the face commander and certainly the most obvious leader for the deck, being the only one that directly supports artifact creatures by giving them menace and producing one each turn (often called a "karnstruct")
TAG TEAM Pokmon-GX were available as standard TEAM TEAM GX cards, Full Arts, Alternate Arts, and Rainbow Rares
We're also waiting on being able to add Shiny forms and some alternate forms (such as the bazillion Alcremie forms), so we don't currently have that available - but we should do in a future update
By contrast you essentially never cast Boon of the Wish-Giver
You decide when your main phase ends
It was also considered a financial failure, so once again our good friends at R&D were forced to make real Magic cards instead of fun ones