Why every "cape" universe tries to have their own Supes/bats?

No.87293736 ViewReplyOriginalReport
People always talks about Red Batman, Black Batman, not-Batman, blonde superman, other blonde superman, aliener-superman, white batman etc.

Why does Marvel feel the need to have so many clones of the World's Finest?
Aside from joke characters, DC doesnt really care or tries to have their own "spiderman" or "wolverine".

Why does Marvel suffers from Capeenvy?