This is a really tough one! We love them both so much - but who will win?
Black Widow's a super skilled spy and assassin - we really wouldn't want to mess with her. But Wonder Woman is an immortal princess demigod - and that's pretty hard to compete with...
Black Widow is an original member of the Avengers which is pretty awesome. But Wonder Woman's in the Justice League. WOW - this a seriously tough competition.
Who do you think should win out of these amaze women? Watch the video to find out who's the champion!