Busoni's Berceuse is a departure from Romantic tradition, featuring complex harmonic shifts and an almost static, hypnotic quality. It is a masterclass in tone color and atmospheric control.
The technical challenge lies in the complex, layered texture and the requirement for precise, atmospheric pedaling.
Comparable difficulty and character — good candidates for what to learn next.
Berceuse for Piano, BV 252 is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 9.
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 Berceuse for Piano, BV 252 lasts about 5 minutes.
Berceuse for Piano, BV 252 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 Berceuse élégiaque, BV 252a by Ferruccio Busoni, Albumblatt, BV 272 by Ferruccio Busoni, Albumblatt, BV 272a by Ferruccio Busoni — see the full similar-pieces list on this page.