And if you liked this movie you might like "In Bruges". Very similar in mood and the same two lead actors (and director). Personally I liked In Bruges a bit more but they're both good
Both are wonderful Black comedies, imo. I agree that the story and characters are different (but that's to be expected given they are different movies after all) but the mood is similar between the two. I'll concede that Banshees is darker than Bruges, though.