I've only listened to a bunch of the first part, and I didn't hear anything different that I noticed apart from one little thing that sounded strange to me. Right after the Grand Moff Tarkin line that gets cut off, it cuts to the dead Jawa scene... and there is what sounds like a trumpet solo in the soundtrack. It sounded really odd to me, different from what I've heard before, kind of like if someone was playing 'Taps' much too loudly during the scene. I went back and listened to one of the other soundtracks, and the trumpet there did sound different from the 70mm mix. But it could very well just be the placement of the recording equipment and the particular way that trumpet solo was mixed.

I dunno... somebody else take a listen, compare, and see what you think. I'm doubtful that it's anything of significance.

--SKot