Coleridge-Taylor's Ballade is a virtuosic work that demonstrates his mastery of dramatic tension and structural development. It is characterized by swirling broken-chord figures and intense, wide-ranging dynamic shifts.
Mastery of rapid, wide-spanning arpeggios while maintaining an even dynamic balance is necessary for performance.
Comparable difficulty and character — good candidates for what to learn next.
Ballade (Op.73) 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 Ballade (Op.73) lasts about 7 minutes.
Ballade (Op.73) 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, Boléro by Maurice Ravel, Piano Sonata No. 8 'Pathétique' by Ludwig van Beethoven — see the full similar-pieces list on this page.