Batman and Spiderman

I recently watched Spiderman and Dark Knight. I thought that Spiderman was more suitable for children and teenagers, while Dark Knight was more for adults. Spiderman deals with issues of identity, such as what a good person is and what power is for. While these are important and fundamental issues, at some point people have to resolve them and start doing stuff already. This is where ethical issues begin to crop up, like means vs ends, revenge etc, which are themes that Dark Knight explores.