Compare and contrast- Of mice and men

Today while we watched the movie version of of mice and men, I noticed some some slight, and some significant differences between the book and the movie. One of the most significant to me, was probably (the last 5 minutes of the movie, or the last 3 pages of the book), when george kills lennie, in the movie george talks to lennie about tending rabbits and suddenly stands up, twists and shoots him in the back of the head, i found this was too sudden, and almost a little cocky. in the book, there is much more dialogue, and also one of the most significant parts, when lennie twists his head around to look at george, and george says "No, Lennie. look down the acrost the river, like you can almost see the place" george says this for two reasons: He doesn't want lennie to turn around and see the gun, and freak out, he wants lennie to be happy and calm. the second reason is that, george loves lennie, and they are so close, he feels like he won't be able to live without him, and he knows that if he and lennie lock eyes, it will all be over and he won't be able to shoot him. another difference i found was with curley's wife, in the book, she seems like she has much more energy, and seems more enthusiastic and charismatic, where in the movie she seems much more depressed and less enthusiastic. i think this could have been for two reasons, either it was the directors way of taking a different direction with the character, or the actress herself was just lacking in energy in charisma. over all, i think the movie followed the book pretty well, and i think watching the movie was a nice break from working.