Batman and Spider-Man have a lot in common. Batman and The Amazing Spider-Man are consistently the bestselling titles in the superhero comic industry. Their respective publishers milk them for all they're worth. Everyone knows who they are and there's a good chance that one or both of them is the favorite superhero of someone who has never read comics before. They both are based on animals that some people are scared of and have "man" in their name.
Source：https://www.cbr.com/batman-spiderman-biggest-differences/
