Ultra Ego Vegeta may be stronger than Ultra Instinct Goku (for now), but he's hardly the strongest character in Dragon Ball ...
Vegeta doesn't have as many transformations as Goku, but that's simply because the Prince of All Saiyans doesn't need them.
Dragon Ball Super's power scaling means that the series' forms are leagues stronger than anything seen in Dragon Ball Z, & are only getting stronger.
Dragon Ball fans often debate the strength difference between Goku and Vegeta, but the actual reason for the difference isn't ...