Honestly, power potential wise both are relatively even.

Im actually writing a fan fic of this rn called War of the End Bringers

@Slyme quin sick i always wanted a story where these two fight is there a way to read it on here after you release it?

Both are pretty even, but one is a planetary threat who wants to be Celestial level cosmic and is a cosmic threat. Either way, this is a much need battle that Marvel needs to make happen.