Here goes:

Firstly the 2006 DVD/HDDVD/BD is a WB restoration that tried to bring color back to the faded negative which I didn’t realize had gone. It’s early Eastmancolor.
Second the 5.1 remix reportedly centers the dialog. BOO! According to a HTF post only the LCR masters survive and the surround channel had deteriorated and was thus unuseable. Originall the film was to have premiered in full 4 track Cinemascope mag (LCRS) and Perspecta directed mono.

Now: The LDs use the same source. The Criterion is more stable and has less noise due to being CAV. The MGM CLV is noisier but has better framing. The Criterion is cropped a bit on top, and the MGM restores this while maybe giving a slight bit back on the sides as well. It also has some color fluctuation between reels where the Criterion does not despite them using the same source. Audiowise the mix is the same, but the Criterion is clearly mono-ed in feeling where the MGM is stereo despite feeling very boxed in. You can hear the directional dialogue panning in both tracks despite the Criterion being mono. The opening title score is far more effective on the MGM. (It may be one of their cut and paste the soundtrack CD master in the transfer jobs.)
The CAV MGM was reputed to have a better transfer and be even better on the framing. This was ported to DVD as shown in the DVdbeaver caps. Those look pretty much like the CLV image albeit with some differences probably like how MGM redid 2001 for the CAV box after the first CLV issue.
The BD restoration has better framing again but there’s just something about the color and contrast that seems off to me. It may be all that they could do with the negative but there are others online who have felt the same.

So now I need the CAV and the BD. Hmm…the collecting for research never stops does it? 😉