Yes, there is a different fantasy world in the screen of the cinema.
I grew up watching the films and reading the books of The Lord of the Rings simultaneously. I think it is good to still talk about the films and the books together. This is especially true that another of my favorite fantasy worlds has now come to the screen in the form of a show on Amazon Prime Video. That one is The Wheel of Time and it is the second most important fantasy world to me.
RE: How different is the book from The Hobbit movies?