Max Jentsch's Ballade is a dense, virtuosic work reminiscent of the late Lisztian tradition. It relies heavily on wide-spanned chords and dramatic, bravura-style gestures.
The pianist must focus on forearm relaxation to support the large, dense chordal writing without creating tension.
Comparable difficulty and character — good candidates for what to learn next.
Ballade (Op.63) 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 Ballade (Op.63) lasts about 7 minutes.
Ballade (Op.63) 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 Barcarole by Max Jentsch, Ballade No.2 by York Bowen, Ballade by Georg Schumann — see the full similar-pieces list on this page.