I've not yet tried kwm so I am not really a good person to ask. In reading about kwm it seems to compare well to Amethyst in terms of features and use case goal

I've not yet tried kwm so I am not really a good person to ask. In reading about kwm it seems to compare well to Amethyst in terms of features and use case goals. I've used Amethyst through several releases and seen a lot of improvement. If I had to make a real opinion all I could say is that Amethyst appears to be more mature (my assumption is that Amethyst has been around longer). I do like that the author reacts positively to feature requests and maintains a transparent development path: https://trello.com/b/cCg3xhlb/amethyst https://trello.com/b/cCg3xhlb/amethyst. All of this said kwm looks promising and I think it is awesome more people are using tiling wm's.