Moritz Moszkowski's Op. 20 is a light-hearted, technically demanding work that exemplifies the composer's characteristic keyboard brilliance. It is musically distinctive for its witty interplay between registers and sparkling, rapid-fire runs.
The primary challenge is the precise, light-touch articulation required to achieve the necessary 'scherzando' character without becoming muddy.
Comparable difficulty and character — good candidates for what to learn next.
Allegro scherzando (Op.20) 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 Allegro scherzando (Op.20) lasts about 3 minutes.
Allegro scherzando (Op.20) 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 Caprice espagnol by Moritz Moszkowski, Boabdil by Moritz Moszkowski, 12 Variations on "Ah vous dirais-je, Maman" by Wolfgang Amadeus Mozart — see the full similar-pieces list on this page.