The best way to scale omnipotent characters.

So I thought about it for a sec and realized that anyone can create an op being, but how do we know that one is stronger than the other? How about we just look at the the universe that they govern, and see how popular their verse is in real life and how much influence it holds, for example: spiderman and superman are far more popular than anything the scp or Kajiri Kamui Kagura have. So with that we can know that one above all and the presence beat the shit out of the Scarlet king and hajun! Because their creations have much more influence in the real world. I dont know how good of an idea that is, but that's how I'd settle the debate.