the director's cut is really not a huge change compared to the original. it adds:
- some new suits for york which give him more health/etc, but director's cut is already easy as it is.
- some kinda offensive (imo) costumes for emily, like a bunny girl costume.
- an optional villa for york to buy, which makes no sense why he would get a house in greenvale when he can just sleep in the hotel as he's there just to solve a case.
- and the biggest thing, which isn't that big, is a few new cutscenes. in these cutscenes, the whole story of the original is framed as a story that a very old zach is telling his very young grand daughter (which seems really unnecessary, ruins the ending, and is an very weird story to tell a kid anyway.) in the end it seems like zach dies, and as the sequel seems to have other plans for zach i can see why these cutscenes were cut from origins.