Superman vs. Batman and Philosophy, Michaud Nicolas

Since both Batman, the megalomaniacal industrialist, and Superman, the darling of the media, sometimes operate outside the law, which of them makes the better vigilante -- and how do they compare with Robin Hood, the anonymous donor, the Ninja, and the KKK? Which of them comes out better in terms of evolutionary biology? Which of the heroes works more effectively to resist oppression? Which one is better for the environment? Which of these two makes a better model and inspiring myth to define our culture and society?