Well, I hope that I can qualify for that answer. To be honest, I have not read a legit comic in my life. So, movies, shows, and movies will do.
DC: Better with Sci-Fi, more popular/classic heroes (Superman and Batman are by far the most popular) , more realistic looking movies, CGI looks better, sticks with the bold image.
Marvel: It feels more for the modern world, people like the action-like image, most characters can compare to real life (Tony Stark is depressed and jokes around), open to different ideas, sometimes a little cheesy.
Marvel:
Iron Man, his personality is great, but they made 4 movies with him. The last one, 3, had the worst plot comparing to the other movies.
The Avengers, (movie) was not too bad. One thing, WHERE IS SPIDERMAN?
Spiderman, cheesiest teenage hero.
DC:
Green Lantern, the movie sucked. Plot sucked. Green costume is dumb
Batman, all of these are dark intense movies, but still PG-13
Superman, well, up and down. New one deserves an A+, they fixed the costume and the way he is portrayed. He isn't this, super popular smiling hero anymore that waves to American crowds while flying.
Well, I'm done for now. I know I probably messed something up, and an expert will hunt me down. These are my opinion/pov.