Stanley Kubrick

The 4K discs in both Criterion and Imprint sets are FiM encodes, but low-passed, Imprint minimally less so. Unfortunately, unlike with The Killing, Kino does not hold up at all, the grain is much rougher and the compression visibly struggles making for a much less pleasant watch, even if select stills look better.

All discs use the same source transfer. Criterion cleaned up some hums and hiss, but lost a little bit of high-end detail. Unlike The Killing, the difference's relatively mino.

The Criterion Complete Kubrick and Imprint 1953-1957 sets include remastered BDs. All standalone releases are from an earlier master.
Arrow UK Blu-ray has an exclusive isolated score & effects track. Kino Lorber and Imprint have an exclusive commentary each.

The 4K discs in both Criterion and Imprint sets are FiM encodes, but low-passed. The compression is better, but some of the grain is lost. Difference is pronounced in screen caps, but not likely to be noticed during playback, without a reference to compare it to. Comparisons

All discs use the same source transfer. It's not of the highest quality, and it includes some slight distortion, looping, clicks, pops, and hum. Criterion cleaned it up for their release, but unfortunately also lost a lot of fidelity in the process.

MGM NTSC DVD doesn't seem to have some of the more prominent distortion and has slightly different EQ but is otherwise the same.

The Criterion Complete Kubrick and Imprint 1953-1957 sets include remastered BDs. All standalone releases are from an earlier master.
Arrow UK Blu-ray has an exclusive isolated score & effects track. Kino Lorber and Imprint have an exclusive commentary each.

US Criterion 4K Blu-ray > UK MoC 4K Blu-ray > Australia Imprint > US Kino Lorber better encoding

The MoC, Criterion and Imprint UHDs were encoded by FiM making all 3 very close. The higher bitrate helped in deciding and some luck; however Criterion is the most consistent one of all 3. Imprint has some scenes with more splotchy grain while MoC is quite close to Criterion but has some more blocking in dark scenes (e.g.: comp #27). With Criterion’s superior audio, it ensures complete consistency.

From cbc: "I'm personally quite fond of the restored track on Eureka's 4K Blu-ray. It does have spots with objectively worse fidelity, but for the most part, it sounds a lot more natural and less shrill, particularly dialogue. It seems to be a new mixdown of stems. Technically a remix, so not everyone's cup of tea, but it's not revisionist like most new movie mixes tend to be"

Both Imprint (included in their set) and Capelight (on its own/individually) offer remastered BDs. All other BDs, including the one included in The Complete Kubrick, are sourced from the same older master from around 2010.

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

Included in the Complete Kubrick box set with FiM encode of the same master from the Sony release without the filtering; Comparison between Sony and Criterion.

Included in the Complete Kubrick box set with FiM encode of the same master from the WB release without the filtering; WB 4K early pressing has errors of a shot, later pressings fixed. Comparison between Criterion and WB.

Included in the Complete Kubrick box set with FiM encode of the same master from the WB release without the filtering Comparison between the Criterion and WB.

US Criterion 4K Blu-ray > International WB 4K Blu-ray see caps. While WB has better highlights, Criterion resolves grains better and is believed to have a more accurate color grading.

For Criterion 4K Blu-ray: The better resolution and the subtly adjusted grading paired with HDR makes for a more rounded, fine-tuned experience. The encoding is a leap forward from the Blu-ray as darker shots are no longer a macroblocking mess on the 4K.

Source:

• caps

• Chris's review

• nicolas review

Included in the Complete Kubrick box set with FiM encode of the same master from the WB release without the filtering, 1.85 ratio restored for US Cut; both US and International Cuts are 4K.

No Blu-ray or DVD release until the Criterion 4K Blu-ray has presented the US in its original theatrical aspect ratio of 1.85:1. The International Cut has never been presented in it's OAR of 1.66:1 in any home video releases.

The packaging on the back of the WB 4K Blu-ray incorrectly states it as 1.85:1 when the movie is actually 1.78:1 as is the original Blu-ray. 

Included in the Complete Kubrick box set with FiM encode of the same master from the WB release without the filtering, 1.85 ratio restored

FiM encode Caps

UK Warner Bros Steelbook 4K Blu-ray is slightly worse in encoding compared to FiM but otherwise excellent see caps

Old WB Blu-ray has exclusive extras