Ethan Laidlaw

Youtube HD Streaming apparently from Library of Congress but not officially. This is a significant improvement over previous public domain sources though, so it's enough reason to believe it's a newer scan

US Shout! Factory or UK Eureka Blu-ray likely very similar from other comparison in the same boxset see DVDBeaver

Imprint Blu-ray not only has the best encoding, but also has the "correct" aspect ratio compared to ClassicFlix which is horizontally stretched or Eagle Pictures which is squished see DVDBeaver caps

4K restoration from Original Camera Negative

Indicator Blu-ray has better encoding than Criterion Blu-ray, both 4K restoration, see DVDBeaver caps

No caps on France Elephant Films Blu-ray

Fox Blu-ray has both Todd-AO and Cinemascope on each Blu-ray disc. The Todd-AO is a 30 fps restoration from 65mm IP scanned at 8K

Indicator Blu-ray has better presented extras plus additional unique extras.

Likely from TCM Streaming

The mono on the Criterion is severely filtered resulting in it sounding incredibly muffled. It is nearly as filtered as the 2003 original Universal DVD which had extreme filtering and sounds horribly thin. The 2008 DVD remaster and original Laserdisc analog mastering are mostly left alone. The original LD master is from a worn element but otherwise sounds very natural. The 2008 DVD is the highest quality version we have without the heavy filtering and the defects of the LD master. It isn't perfect but easily the best of the main four sources by a dramatic margin. 

The existing 4K SDR restoration looks excellent, but the Criterion extras are limited and disappointing. The classic Stewart interview commentary from the LD is ported over but given a new mastering. Compared to past releases it has been very slightly noise reduced.