I'm not a huge fan of any version of the movie so I can't catalog all the stuff that's different between this version and the other two that I've seen. All I can say is that I did like it and thought it was a little better than the other two versions, although, at times it seemed like he might have gone for different takes just to be different. Still, Ridley Scott says in the intro that he prefers this verison.
It helped me that it's been so long since I've seen the theatrical version that I no longer remember most of Harrison Ford's voice over. I only had a few bits pop into my head so that was nice. Before I really couldn't get into the difference between the voice over version and the non-voice over version because the frickin' voice over was in my head whether it was in the movie or not.
I haven't watched any of the other version yet, including the work print, and I've not gotten to the extras disk or any of the commentaries.
The brief case that the set comes in is pretty cool.
