This virtuosic showpiece is based on operatic themes by Adam and demonstrates Wolff's mastery of the bravura style. It is defined by its flashy passagework and demanding pianistic flourishes.
Ensure the high-velocity scalar passages are even and balanced throughout the register changes.
Comparable difficulty and character — good candidates for what to learn next.
2 Impromptus brillants sur La part du diable (Op.85) 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 9.
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 2 Impromptus brillants sur La part du diable (Op.85) lasts about 8 minutes.
2 Impromptus brillants sur La part du diable (Op.85) 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 No.2 by Édouard Wolff, Bourrée fantasque by Emmanuel Chabrier, Wanderer Fantasy in C major by Franz Schubert — see the full similar-pieces list on this page.