Otis Murphy played this piece on his recital here at my school last year. After hearing it, I ran over to dorn's website and ordered it. After listening to it, I realized they were both in completely different keys. So I know that the dorn version and Otis's versions are different. I have the recording by Koryun, but I'm not sure if it's different. The biggest thing I noticed in both of their recordings, was there was altissimo, but there's not really any in my version of the piece.