This piece is a late-Romantic style elegy focusing on deep, resonant sonorities and a poignant harmonic vocabulary. Its distinctiveness lies in its thick, chordal writing that demands a nuanced sense of touch.
The technical difficulty lies in executing large, sonorous chords with delicate balance to avoid percussiveness.
Comparable difficulty and character — good candidates for what to learn next.
An Elegy is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 An Elegy lasts about 5 minutes.
An Elegy 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 Alanguie by Julian Raoul Besset, Pavane pour une infante défunte by Maurice Ravel, Quejas, o la maja y el ruiseñor by Enrique Granados — see the full similar-pieces list on this page.