This version is identical in substance to the S.545 listing, representing the solo piano arrangement of the Arcadelt piece. It showcases Liszt's ability to imbue transcription with genuine emotional depth.
Focus on the legato connections between the broken chords in the accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
Ave Maria IV, Solo piano (S.545) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Ave Maria IV, Solo piano (S.545) lasts about 4 minutes.
Ave Maria IV, Solo piano (S.545) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Ave Maria in G by Franz Liszt, Albumblätter für Prinzessin Marie von Sayn-Wittgenstein by Franz Liszt, Blume und Duft by Franz Liszt — see the full similar-pieces list on this page.