The Rhapsody in G minor is a powerful, agitated work that showcases Brahms's virtuosic writing style. It is defined by its sweeping gestures, fiery energy, and structural density.
Mastery of large chordal leaps and the ability to maintain clarity during high-velocity octave passages are essential for this piece.
Comparable difficulty and character — good candidates for what to learn next.
Rhapsody in G minor, No. 2 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 10.
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 Rhapsody in G minor, No. 2 lasts about 6 minutes.
Rhapsody in G minor, No. 2 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 16 Waltzes by Johannes Brahms, Variations and Fugue on a Theme by Handel by Johannes Brahms, Intermezzo in A major, No. 2 by Johannes Brahms — see the full similar-pieces list on this page.