LTK

CBS-Fox WS LD vs MGM remastered WS LD vs SE vs UE vs BD:

Audio: Two mixes. Original Dolby surround and 5.1 remix done for the SE. The UE and BD variants appear to be the same mix but I will say the version found on the SE has a few deficiencies that were cleaned up. Again, the original mix is far better here. Comparing sequences reveals they got it right in 1989 and everything is mixed much better. The 5.1 mutes parts of the score quite frequently and dials them down in favor of isolated effects. Not good. The older Fox disc sounds a bit lesser and the MGM is perfect.
Winner: MGM LD hands down. The 2.0 mix on UE and BD is the original mix but neither sounds as good as the LD.

Video: Old Fox disc is a bit contrasty and video like. Very 1989-video look to it. Colors are on the drab side and somewhat muted. The MGM is like lifting a veil off. Everything is better and improved. Same transfer. The SE is another leap forward, but there is additional damage here and there. Colors are better, contrast appears mostly healthier. The edges of the frame on the sides though reveal that perhaps too much area was revealed. Also there is very little fine detail and there is an overall look of video processing going on. The UE improves all these again but there may be some Lowry-esque tints poking their head in. Some shots just look quite un-1989. The BD bumps this to 1080p and does a few additional bits of cleaning from what I can tell.
Sooo…BD for detail and overall. MGM LD/SE for more original look, though they’re very very close. I think with a touch here and there it would be fine, or that this may be a print source vs. higher source issue.