Now that some time has gone since this wonderful recording surfaced, have anyone heard any other differences in terms of content compared to the 35mm Dolby Stereo other than these:

When Luke runs out of the wampa cave, there is a sound of his lightsaber deactivating even though it stays lit onscreen, this error later reappeared in the Special Edition.
The TIE fighter sound effects are different in the Imperial fleet establishing shot after Luke's failure at the cave. (Can be heard on the GOUT's Spanish and French audio tracks)
Different laserfire can be heard during the snow battle, the sound used for TIE fighters instead of X-wings.
The establishing shot of the rebel fleet at the end of the film doesn't contain tracked music. The two additional shots of the fleet added to the 35mm version required the tracking of a section of "Yoda and the Force" to precede the cue "The Rebel Fleet".
Lando's line "Luke, we're ready for takeoff." is a different take. (The same take can be heard in the Special Edition)
The exterior shot over which Lando says "When we find Jabba the Hutt and that bounty hunter, we'll contact you." is not in the 70mm version, instead when Luke says (voice over), "Good luck, Lando" the scene cuts directly to inside the rebel cruiser where Luke says, "I'll meet you at the rendezvous point on Tatooine."
Lando's line "Princess, we'll find Han. I promise." is a different take.