After seeing the *Akira* [movie](http://www.imdb.com/title/tt0094625/) (directed by Otomo Katsuhiro) I later found out about the existence of the manga series on which it had been based. 

Is the movie adaptation faithful to the manga, with only minor variations? Or will I get a lot more detail from the story by reading the manga (and if so, just how much more)? 

Basically, **how different are the manga and movie versions of *Akira*?**