Essentially a variant or alternate attribution of the same pedagogical etude found in Zimmerman's minor-key repertoire. It focuses on consistent rhythm and controlled finger strength.
At Henle 4 this is an intermediate piece that expects secure technique and real attention to phrasing. The main demands: fine finger independence within the hand; precise articulation — the difference between crisp and blurred is the piece; and continuous sixteenth-note figuration that must ripple, not chatter.
Maintain a consistent tempo throughout the varied finger patterns.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Etude in G minor is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 4.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 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 Etude in G minor lasts about 2 minutes.
Etude in G minor 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 Body and Soul by Johnny Green, Waltz in C-sharp minor, No. 2 by Frédéric Chopin, Waltz in A minor by Frédéric Chopin — see the full similar-pieces list on this page.