FiM

ArtcraftBlu-ray is a great new 4K restoration encoded by FiM and should be much superior to an older 2K restoration by Grapevine

Given that Indicator Blu-ray is encoded by FiM and Kino Lorber uses the same transfer judging from different screenshots, Indicator is most likely to be better encoded.

Indicator Blu-ray is encoded by FiM and likely better than Kino Lorber Blu-ray

FiM encode and none of the low-pass filtering present on the Criterion 4K, resulting in more detail and better handling of highlights on Imprint
Review, comparisons

All HD and 4K sources use the same 2009 restoration. Criterion's master (also used by Imprint) is a bit more rolled off, though the difference is minor.

Imprint AU 4K is world UHD debut and encoded by FiM. Part of the The Cinema Of Powell & Pressburger - Collection Two set.

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.

Gorgeously filmic 2K remaster supervised and approved by Jerry Schatzberg from Fox and flawlessly encoded by FiM.

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.

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. 

The DV/HDR grade is tasteful and not overdone. SC has better compression, though not flawless; encoded by FiM, but Criterion also holds up quite well. Both releases claim to be approved by Lynch.

SC has a missing fade that Criterion reinstated.

The film was originally mixed in Dolby Stereo (matrixed LCRS). For the 4K restoration, this mix has been transferred from the original magnetic elements and remastered with Lynch's supervision. Unfortunately, the fidelity suffered in the process, with many sections ending up significantly less detailed due to a noise reduction pass. This track has been altered compared to the original, with reverb added to some dialogue, different ambient sound effects, changed panning, and extended bass.

For the unrestored mix, there are two major options, each with its own merits and flaws. The 2001 Paramount DVD, which I would say is the best well-rounded mastering, and the 1999 Japanese LaserDisc, which has noticeably better clarity and high-end detail, as well as better dynamics, but suffers from occasional distortion and has less bass than the DVD.

The LD also has some ambiance buried too low in the mix, and some dialogue panned more to the centre than the DVD. There are no content changes I was able to find. Unfortunately, I don't know what accounts for those differences.

The other available tracks all have more significant flaws. The Italian and Japanese BDs use the same base mastering as the DVD, but with some patching in a few shots. HD-DVD is sourced from an inferior transfer, the same as the Momentum DVD.

The 5.1 remix, originally introduced on the 2002 DVD, and carried over without changes to the 2009 BD is a light and mostly faithful remix, with fairly minimal LFE and surround use, but still potentially worthwhile as the only discrete track.

Imprint Australia 4K Blu-ray has slightly better compression than Criterion 4K Blu-ray.

The master in DV looks all but identical to the Criterion’s HDR grade. Detail-wise, FiM’s encode looks like it uncovered a tiny bit of extra high-frequency information that got filtered on the Criterion. See nicolas review

1990 Criterion LaserDisc/1993 MGM LaserDisc/2002 R2 MGM DVD are the best. See blah-ray https://blah-ray.blogspot.com/2018/01/raging-bull-1980.html

Imprint Australia 4K Blu-ray has better audio than Criterion 4K Blu-ray, from nicolas:

I believe that what’s on Imprint’s 4K is one of the good mixes MGM and Criterion released during the LaserDisc days. Music is powerful and detailed, dialogues have excellent fidelity and ambient sounds have perceptible depth. I compared the "new" 2.0 with the anemic 5.1 as well as the Criterion 4K mix and could clearly hear the improvements.

Arrow 4K Blu-ray is encoded by FiM and is better than Criterion, see caps https://slow.pics/c/Z2RRQAAT

Criterion 4K Blu-ray vs Blu-ray: caps colors are more different and nuanced than anticipated even in the SDR-converted caps and the usual gain in highlight detail is also apparent. Encode looks excellent except for the brightest areas as usual.

Arrow and Criterion 4K Blu-rays have differing extras 

Criterion has FEL Dolby Vision, Arrow has MEL

Arrow Limited Edition includes the Theatrical Cut Blu-ray from an older HD master, most likely from a 2K scan of an interpositive.

(Arrow 4K Blu-ray's mono seems to be out of sync, suggested by comparisons. Issue is TBC officially)

Arrow LE will have an exclusive 3rd disc which will not be on the standard edition