The footage in Empire of Dreams didn't come from the same source as the Def Coll LD/GOUT DVD.
I don't think it was ever resolved exactly where it came from, prev. thread was here:
http://originaltrilogy.com/forum/topic.cfm/What-is-the-source-of-Empire-of-Dreams/topic/13538/
Although the footage is anamorphic 16:9, it appears to be an upscale from a native 4:3 source, and I recall Harmy saying that there are no complete shots present so it was no use in his De-specialized Edition.