[Brody]

I'll give this a try, but it's totally subjective as Newworlds pointed out:

A cartoon is very clearly in front of me, generated within an electronic box. The images are clearly defined by Hanna-Barbera or whoever else might have drawn them. The voices are provided courtesy of Casey Kasem! It's the story, the characters, the world as those people see it and define it.

When I read a book, the plot and actions of the characters are defined, but how they sound, what they look like, the world they inhabit - that's pretty much in my mind. That, to me, makes it more immersive. I can lose myself in a book the way I *can't* while watching a cartoon.