My pal (and the hardest working man in the comic community, this time of year) Gary Sassaman finds an interesting example of an old pulp cover that was ripped-off for a classic cover on Superman's Pal, Jimmy Olsen. Mort Weisinger was the editor of Olsen at the time and Gary wonders if Mort had a hand in the creation of the original version, which appeared on the pulp magazine, Thrilling Wonder Stories. Answer: Yes. Thrilling Wonder Stories was published by Standard Magazines, and Weisinger was its editor from around 1936 through 1940. This is the July, 1940 issue so it was probably one of his last issues.
Betcha the Jimmy Olsen cover came about as follows. Weisinger used to use the children who lived in his neighborhood as a kind of unofficial "focus group." He'd take crates of comics home from the office and hand them out every Saturday afternoon at some specified time. But before he gave out the comics, he'd ask the kids which covers they liked, what they'd like to see Superman do, etc. One time, one of them said, "I wanna see Superman fight King Kong" and when all the others chimed in that that would be neat, Weisinger made a note to go to the office and order up a cover of Superman fighting a giant ape who was climbing a building. The script was later written around the cover.
So my guess here is that Weisinger had a copy of that pulp around and showed it to the neighborhood tots one Saturday. When he got an enthusiastic response, he took the pulp into the office, handed it to artist Curt Swan and said "Here, draw this but make the monster Jimmy Olsen!" Which would explain the similarities not only in idea but in composition. Swan was not the kind of artist who would have copied someone else's cover design in any way unless ordered to do so.
Quite a few pulp covers morphed into comic book covers, though usually not that blatantly. Quite a few comic writers were former pulp writers so a lot of ideas were recycled that way, as well. I'm sure there must be examples of some of those comic book ideas that came from the pulps going on to become a videogame or some other 21st century concoction. What goes around comes around and vice-versa.