@Doctor M & Spaced Ranger

The wording is a bit sketchy, but it simply means that what you see on the LD is what you see on the DVD, the full roadshow version, and that it has been released outside the US under the "Walt Disney Classics" banner, since before that, a different video master was used, showing the orchestra preparing for the concert instead of seeing Deems Taylor.

However, the next paragraph mentions: " In the 2000 and 2010 releases, Deems Taylor's voice has been overdubbed throughout by Corey Burton because most of the audio tracks to Taylor's restored scenes have been lost"

So, I'm sorry, but it seems that the changes to the narration for the 2000 restoration were universal and final.