It would seem that the trailer in post #3 would be earlier than any trailer with the Tommy Jung logo, since that trailer just used a standard font - not even one of the earliest SW logos. :-/
Leonardo said:
Holst's "Mars" was used as a temp track for the actual movie, specifically the first shot of the Blockade Runner and the Star Destroyer, before John Williams composed any of his scores. I would guess the movie at that point was still at workprint stage.
"Winter" may not be easy to recognize like this, I suggest speeding up the video up to roughly 140% or 150%.
I guess that's where the confusion came in. Whoever told me that, must have assumed the temp track music was also used for the trailer.