I've seen both ocpmovie's "Classic Edition" and Adywan's 1980 theatrical reconstruction.
There's absolutely no contest. In every instance where I knew GOUT footage had to be used, I simply could not tell. And I was looking for it.
There are a couple little things that weren't changed back, but nothing significant at all.
The only major thing I remember Ady leaving be was the 2004 "fix" to Han's shirt in the "I love you"/"I know" sequence. Then, of course, some slightly recomposited effects were left be (like Luke falling down the shaft in Bespin).
As far as audio, everything is as it was in 1980. The snowspeeder crash sound effect is there, too!
And yes, I still have Ady's Phantom Menace theatrical reconstruction. The difference in the few shots taken from the laserdisc is noticeable, but the shots are so short it doesn't really matter. And I still haven't gotten a chance to listen to the proper 5.1 track (taken from the laserdisc), so I don't know how that sounds. (I don't have this on DVD any longer, though, I just have it as an MKV file, so I can't help anyone get hold of that disc, sorry.)