Jerry Brown

Same master, but less bitrate starved.

The encode on the BD is preferable to the UHD. Same master, but less bitrate starved: https://x.com/SadHillDevan/status/1530057783885721607?s=20 and see caps

The Universal HD master is appalling. This is a large format early Technirama film that has been hit with a massive amount of DNR resulting in a smeary appearance throughout with little detail. On one hand it is still a better scan than the old DVD with better color and element issues addressed. On the other it is barely above the DVD upscaled in other moments. The mono audio has been horribly processed to sound thin, canned and lacking in overall fidelity. The DVD clearly uses the same source element for picture and sound and here the sound is left alone. It sounds miles better. The Kino BD is technically the best US release but this master has been released in Europe where it likely has better encoding. The Kino BD adds a basic commentary. This film needs a proper transfer and audio presentation desperately. The HD master is so lackluster that the DVD despite its age is arguably preferable in visuals and certainly far superior in audio.

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.

Included in the Complete Kubrick box set with FiM encode of the same master from the Universal release without the filtering.

DTS:X mix on Universal 4K Blu-ray most closely approximates original surround mix

Criterion DVD and Universal 4K Blu-ray has additional features not found on the Criterion 4K Blu-ray