Do you want to compare Supergirl with Black Widow? Discover the powers, weakness & weapons of Supergirl and Black Widow from Supergirl Biography and Black Widow Biography. Find out all about Supergirl and Black Widow.# Check out how is Supergirl unique and distinct from Black Widow. Discover their love interest, sidekicks, family tree and the movies and games list in which Supergirl and Black Widow have appeared. Find out everything about them here!