scan? context please? because i recall Spectre stopped him, so how could he be omnipotent?
I think you are misunderstanding. I am saying the only reason people believe Superman is more powerful was based on the statement, nothing more. No feats.
Also Spectre doesnt even appear in the story arc, have to find the issue again, and Superman just realises its too much power for anyone and throws the sword away. He was never, at any point, defeated or matched.