I don't really agree with the perception that Powered by the Apocalypse-type games are particularly good at genre emulation. I don't even necessarily think Apocalypse World is a particularly focused example of the post-apocalyptic genre, and to the extent that Dungeon World is more faithful to its genre, that strikes me as a liability rather than as a strength. The #PbtA games I like best tend to be idiosyncratic, if not downright bespoke.