Yeah, I got confused by this as well – Puggo’s 8mm digest ESB project includes the same video differences as the 70mm version, so I just assumed the audio differences in that version were similar if not the same as the 70mm. But that’s not the case – in-theatre recordings confirm the 70mm audio was extremely close to the 35mm audio, in spite of the different video. Go figure.

EDIT: Also, if you haven’t heard it, the 8mm digest audio has even more differences from the 35mm audio than the 16mm audio. Give it a listen, it has lots of “what the hell?” moments, and features alternate Leia dialogue where her lip movements actually match what’s said, rather than the 35mm version, where they definitely don’t (“I know where Luke is.”)