This card's Level is one Level lower than "Gagaga Magician", just like "Dark Magician Girl" is one Level lower than "Dark Magician".
This card has 1000 less ATK than "Dark Magician Girl", just as "Gagaga Magician" has 1000 less ATK than "Dark Magician".
Both this card and "Dark Magician Girl" have effects that involve the support of a monster similar to itself ("Dark Magician Girl" with "Dark Magician"/"Magician of Black Chaos", and this card with another "Gagaga" monster.)
Both cards have effects that can alter ATK.
Both had their artworks edited to be less revealing from the OCG to the TCG.
This is the first monster with an effect that only activates when it is used with a specific monster of a certain archetype - in this case, the "Gagaga" archetype - as Xyz Material.