All the Blu-Rays are from the same master, which is of the highest quality. They did a 4k scan and the cinematographer was heavily involved all the way through. The director was also in the editing room for the sound remix.
This Blu-Ray actually removes a few of the digital tweaks that were added to the Extended version, since they (the director and dp) felt they had gone a little too far with the extended cut tweaks.
The problem with the theatrical version is that its sound remix is not as robust as the Extended version, which is just sensational. It's not a stupid hack job (like The Terminator or Superman The Movie) and you guys know how picky I am.
If the film were only simple stereo I would go ahead and do my own version, but alas, it's 5.1 and I have no idea how to deal with that.
The color grading seems fine to me. Nothing objectionable.
All I object to is the Extended version having a way way too over extended epilogue that goes on forever with no rhyme or reason for being there, unlike the rest of the added footage, which added to the sense of dread.
By the way, when I saw the Director's Cut in a theater the teens in the audience were laughing throughout and making fun of the film. I had to get up out of my seat and tell them to shut their ****ing mouths. When they refused I told them to get out or I'd have them escorted out. They got up and left. Young people will not find this film scary. They are far too desensitized.