I found an article about it. If you care to read.
https://www.avclub.com/book-vs-film-...men-1798213032
There's one thing i prefer towards the end in the film. (Spoilers for both book and the film).
spoilers:end of spoilers
Llewyn's wife refuses to call the coin toss. (Though she might have later). That maybe one legitimate time when Anton felt disturbed. Lllewyn's wife did not give in to what he was calling chance. Scoring a rare defeat if we can call it a defeat. There's one interpretation that seeing the boys lending him a shirt without desiring anything in return, after seeing the spirit of her before he killed her, he considers what he is doing is perhaps wrong. If only for a moment. And i personally found her off-screen death more chilling then Lllewyn's. I knew he was going to die. (Watching a film years later means spoilers are around). But its such an effective scene when he checks that shoe. Its so blunt and cold because she pretty much becomes a non-entity apart from it being so cruel. I have also read somewhere that Chigurrh kills her by that 'gas cylinder thingy'. Though there is something which is different if true. She says something like i know now why the Sheriff was talking about that accident (with the cow) in that place. You remember that happened earlier in the film.