Honestly though, these kind of contests decided on fan votes are basically popularity contests.Oh yeah. And then some. I've had many discussions of a volatile nature with Hulk fans on this topic (not here).
I like debating these things on Rumbles...by far, the best place on the internet to discuss battle oriented questions. I mention this because there are so many differing writer perspectives on similar questions. Recently, Mr. Busiek said, "we rig the fights..." (Edit: so tone is not misunderstood--I cites Mr Busiek's statement to emphasize that writer perspective really shouldn't be included in Rumbles type question--I feel Mr Busiek is one of the top 10 greatest comic writers of all time). Therefore, to include writer perspective on who can do this that or the other is ludicrous. Now to be fair, his view is hard to reconcile with old EIC DeFalco saying, "Hulk is stronger, Thor is more powerful"...the complete opposite approach of Stan Lee who wanted to be fair to each character (and their fan base). Rumbles rules effectively eliminates writer perspective for this very reason.
And, believe it or not, I agree that should be a writer's focus (telling stories). It's up to discerning readers to distinguish PIS moments, or otherwise, to recognize outlier feats. "Telling a story" is how Spider Man beats Firelord or Wally West doesn't beat 99% of his opponents in the first page or two. Writers...want to make it interesting.
Another reason we (Rumblers) focus more on what each character is logically capable of, given their best consistent feats. I have no doubt the topic on Twitter will be an utter shit show.