Warner Bros

4K Blu-ray is missing featurettes from the old Blu-ray

Warner Bros 4K Blu-ray: Huge improvement in colors and detail. The restoration was done by the Academy instead of WB MPI which explains that there’s no grain management or issues with colors. They also accessed the original credit optical and scanned that one instead of recreating them digitally

Theatrical: WB 4K Blu-ray, according to Saentz, the 5.0 is a recreation of the original and subsequently 70mm mix from original elements.

WB Europe 4K Blu-ray slightly better encoding than Criterion (caveat: missing Criterion extras)

Warner Bros 4K Blu-ray (caps; grade on the BD was controversial)

Later Warner Bros Blu-ray and 4K Blu-ray are minor downgrades

The 4K Blu-ray 5.0 is the original mix, but more muffled than LaserDisc and even the previous Blu-ray's gentle remix. The Atmos mix is revisionist.

The 50th Anniversary box set has some exclusive extras.

1991 LaserDisc is Dolby Stereo matrix encoded from the original six track master and this was later upgraded to a 5.1 Dolby Digital version prepared for the first DVD. The 5.1 version may have had some slight tweaking in the process. This was reused for the DVD CE boxset and then the 5.1 on Blu-ray seems like a slight upgrade of the DVD track. (The first pressing from the UCE boxset had audio defects rampant on the Blu-ray. These were corrected for standalone pressings.) All 5.1s sound roughly the same as the LaserDisc 2.0 in terms of the mix, but the LaserDisc PCM mastering seems like the only one that is direct without any major processing.

The first pressing had a botched 5.1 mix, the second one has Atmos, which is an upgrade to the Blu-ray. Encoding is good.

1994 MGM LaserDisc with its caveat being audio errors that were present on every home video release until the 4K Blu-ray. See here.

4K Blu-ray or 2014 Blu-ray 7.1 (more bass but clipped)

The OOP Best Buy Exclusive Blu-ray has a exclusive extra