Board Thread:Questions and Answers/@comment-39203290-20190425012251/@comment-26256072-20190428043201

Suppose a random Muggle gains Absolute Existence. Having mastered the power, he uses it to enhance himself, and eventually changes himself until he's perfect. If he instead gained the ability of Perfection to start with, he'd reach the same endpoint, just without having to make the changes himself.

Either power makes you perfect; but one power makes you perfect by choice, while the other makes you perfect by definition. Which is preferable is a matter of taste, so neither power can be said to be better.