Very different films to be fair. Both very good. I know In Bruges has fairly dark underlying subject matter but that isn’t really the crux of the film, whereas 3 billboards is purely driven by a mother’s grief and there is little distraction from that. Sam Rockwell and Frances McDormand are both high quality actors.
Love Ralph Feinnes’ in In Bruges mind you.
Rockwell is great in seven physcopaths as well. An underrated film that.