The films aren't as angsty as the comics because, well, that's hard and they're shortish features focusing more on action than character stuff. What's there focuses mostly on Steve. And Bruce Banner. And, well, almost everyone except Tony, which makes me sad. There's some differences, like Natasha has a really bad fake accent and Steve are the evolving couple and Tony has a heart problem rather than the Ultimate brain tumor. Oh, and Hank Pym is a giant (literal and figurative) dick. But there is T'Chala in the second one! And Tony has an amazingly lovely voice.