I have seen two other versions of this pieceHuang Yi-Chung Huang Yi-Chung, in the link, said he worked on the piece everyday for basically 9months and picked the best recording out of 10 times he attempted it, and he is someone who played Alkan Le Preux (since the forum cut the timestamp, Le Preux starts at 2:45:00 exactly) in a competition just after playing Liszt - Réminiscences de Lucrezia Borgia &t=9895s .
Seon-Yong Hwang Seon-Yong Hwang sync the piano sheet while he is playing.
Some times ago, I stumbled on this list which "ranks" Liszt repertoire https://www.reddit.com/r/piano/comments/i1t09y/guide_to_liszt_pieces_by_difficulty/