Batman and Iron Man
[ranking: 11]
Similarities: Egotistical billionaires (one who's always, one who dons it as a facade) who use their wealth to build a suit and many toys to fight crime.
Batman first appearance: Detective Comics #27 in May 1939Iron Man first appearance: Tales of Suspense #39 in March 1963
Elongating Man and Mister Fantastic
[ranking: 4]
Similarities: Stretchy, elastic-y super geniuses.
Elongating Man first appearance: The Flash #112 in May 1960Mr. Fantastic first appearance: The Fantastic Four #1 in November 1961
Solomon Grundy and Hulk
[ranking: 10]
Similarities: Anti-heroes with super strength, healing factor, and virtually indestructible (and Hulk was originally gray).
Solomon Grundy first appearance: All-American Comics #61 in October 1944Hulk first appearance: The Incredible Hulk #1 in May 1962
Aquaman and Namor
[ranking: 2]
Similarities: Arrogant, brash, not well liked, undersea titans who rule their own kingdom with smarm and charm.
Aquaman first appearance: More Fun Comics #73 in November 1941Namor first appearance: Motion Picture Funnies Weekly in April 1939
Catwoman and Black Cat
[ranking: 1]
Similarities: Black latex clad cat-thieves who commonly gets romantically involved with their sometimes enemy/sometimes ally.
Catwoman first appearance: Batman #1 in Spring 1940Black Cat first appearance: The Amazing Spider-Man #194 in July 1979
Lobo and Wolverine
[ranking: 8]
Similarities: Short, hairy, foul mouthed fan favorite characters with a tendency to skewer (with a hook or claws) and chomp on cigars.
Lobo first appearance: Omega Men #3 in June 1983Wolverine first appearance: The Incredible Hulk #180 in October 1974
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