Samuel Coleridge-Taylor's Ballade is a substantial, highly dramatic work featuring orchestral textures and demanding virtuosic display. It combines bold thematic statements with moments of intense, intricate passage work.
The endurance required for the powerful octave-runs and heavy chords is the most significant technical demand.
Comparable difficulty and character — good candidates for what to learn next.
Ballade (Op.33) 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 (Op.33) lasts about 9 minutes.
Ballade (Op.33) 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 Ballade by Samuel Coleridge-Taylor, Ballade No.1 by Julius Röntgen, Boléro by Maurice Ravel — see the full similar-pieces list on this page.