York Bowen's second ballade is a substantial, highly virtuosic work that showcases his rich harmonic language. It features complex, lush piano writing that borders on the orchestral in scope.
Effective management of the dense, large-chordal writing and voicing is critical to prevent a muddy sound.
Comparable difficulty and character — good candidates for what to learn next.
Ballade No.2 (Op.87) is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 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 No.2 (Op.87) lasts about 10 minutes.
Ballade No.2 (Op.87) 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 Barcarolle by York Bowen, Bénédiction et serment, 2 motifs de Benvenuto Cellini de Hector Berlioz by Franz Liszt, Ballata No.1 in G minor by Marco Anzoletti — see the full similar-pieces list on this page.