It's like comparing Lord of the Rings in bookform with the movie. Both tell a story but they have different things to offer. The whole point of reading a book is the different experience. You don't have to like it but it's a lot more than reading skills and practising your brain. In movies you are shown the story, in a book you show yourself the story. You create the images, the way everyone and everything looks. You can read the book in one go or you can read it in parts and let the information simmer, you think about everything that was said, described and occurred. Every word you read further creates the story. And the information really isn't the same. You get a different kind of insight on the characters. You don't know what they're thinking. With a movie everything is decided, in a book it's more "alive", if that makes sense.
I fucking loved the visuals in Lord of the Rings, just about everything (fucking Elijah Wood and Orlando Bloom) was at the very least a good transition and even perfect at times but the whole visual part side, the information I received from the book made the movie look like a piece of shit.