I am aware that Stan mentions Spider-Man's influences as "The Spider" and seeing a house spider. We know that the character went through a few design drafts with Kirby before Ditko nailed it. We know that Marvel was very aware of what was working for DC at the time, and that Stan was fueled by a desire to do things differently -- to be hipper, basically. We know Spider-Man wasn't the very first Marvel hero created by Stan, but he was the first obviously superhero "long johns" character... the earlier creations of the FF, Hulk, Rick Jones, and Ant-Man weren't quite as embracing of the tropes as Spidey would be.
--Both flagship heroes are in red, white, and blue
--Both alter-egos are seen by others as bumbling ineffectual goofs, and both work at a metropolitan newspaper
--Both heroes base their morality from their elderly, adopted parents
--When Marvel and DC crossed their superheroes for the first time, they chose these two characters
--Spider-Man's powers are nearly identical to early Superman; ie, both can leap tall buildings in a single bound
Obviously there are differences. "But Superman wears a mask." But there are clear parallels with the archetypes.
You're saying it's either not there, or it's coincidental. I don't think it was. Do you really think Superman had so little influence?
I think Stan approached it as he said -- wanting to create a teenage superhero that the reader could identify with -- and I think in building out his world and backstory, I think he looked to what worked for Superman, and then subverted those things into its own thing.... which is no insult to either character. That's how creations work... they assemble elements from the past and put a new spin on it.
Edit -- Here's an article that explores the similarities and contrasts between the two
https://www.theatlantic.com/entertai...atters/273854/