In all three, they cover the basis of Morrie's disease. They talk about the effects and also his outlook on life once he knows that he's dying. In all three they also make it a big part to show his sunny disposition. He only gives himself a couple of minutes each morning to mourn, then he's on with the rest of his day in a good mood.
I liked watching the movie and the interview. Not only does it give you an image to picture when your reading, but it shows different points of the story. The book from Mitch Albom's eyes. The movies from his eyes as well, but also through directors and the way actors portreyed it. The interview shows you when he's being put on the spot. Out of his 'natural environment' and being asked quesions that he has to answer in front of millions of people.
I don't really like watching movies because I feel it ruins the book. More often than not, the movie leaves out parts or makes scenes different that what I pictured. Also, I like making my own picture and creating what I think everything and everyone should look like. After I see a movie, that image is drilled into my head so it takes away from my imagination. :)