The original theatrical versions were NEVER released on DVD. The shit commonly know as GOUT are NOT the theatrical versions. They are the "definitive collection" masters transfered to a incredibbly BAD looking video.
The differences between the theatrical versions :
1) The colors are different on many scenes - just look at the Tantive IV segment on E4 (the walls, the rebels shirts) or the blue snow on E5. I don't know if these are color anomalies created by the film ageing, or "deliberate creative decisions", but they were NOT on the original movies, just look some older laserdisc or VHS transfers.
2) The digital video noise reduction which was done to this masters fucked the complete video, now we have a video with a very small detail, trails, 4-eyed stormtroopers and similar shit which was not on the original film.
3) Some frames are missing
4) The audio is NOT from the theatrical versions, it is from the DE version. It is VERY similar to the theatrical stereo, but not the same.
5) At some countries (like Austria) the audio suffers from PAL speedup.

I really can't tell anything good about this "Fuck you, fans" release. Those are NOT the theatrical versions, they look and sound like shit.