Liszt's transcription of the Arcadelt Ave Maria is a study in restrained romantic beauty. It relies on subtle harmonic shifts and a delicate touch to sustain the prayerful atmosphere.
Students must balance the thin, ethereal melody with the more active accompaniment patterns.
Comparable difficulty and character — good candidates for what to learn next.
Ave Maria in G (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 in G (S.545) lasts about 4 minutes.
Ave Maria in G (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 IV, Solo piano 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.