Set either version by the side of his brilliant transcription of the closing scene from Strauss's Salome (arguably the best of all his transcriptions) and the differences will become immediately apparent; that work has yet to be recorded, but it has been edited, typeset and performed - by the same Jonathan Powell as retrouvailles would like to hear playing the Ravel!
And arguably the transcription I would most like to hear. Just curious, what did Sorabji think about Elgar?