The King of Tokyo Power Up! Expansion is a logical addition to the game, giving each monster their own special abilities. When I first played the King of Tokyo base game, I specifically felt as though this element was missing. The character specific powers make the game more interesting and improve replay value.
I’ll be 100% honest about King of Tokyo Power Up. While it does change up the game in a way that whichever character you play will have its own set of advantages of disadvantages, the core game itself is still the same. It is not “pretty much” the same, it IS the same.