I just reviewed the Theatrical and Director's Cut side-by-side, and while each cut has extra minor footage the other doesn't, there were no airborne robot gut spaghetti. Just the occasional squirting neck fluids.
That said, I do wish someone were inspired to combine all the cut scenes between the two edits, into one movie, and call it the Nostromo Cut.
I also notice the two releases alternate back and forth between good lighting and bad lighting. I personally prefer warmer and darker lighting, but either version keeps alternating back and forth with bleached blue-white scenes I dislike, while the other cut has a darker or warmer scene.