Do you think it is harder than Liszt's transcription of Schubert's Der Müller und der Bach?
Having played both the above and the Ave Maria, I would rate the latter as far more difficult.Maintaining a flowing melodic line that can be clearly heard I personally find very difficult.
Which version of the Schubert-Liszt? He wrote like, six of them.
This version:&feature=fvstThis appears to be the version mostly played by concert pianists.