These are a set of Hungarian-themed character pieces that heavily utilize folk-inspired rhythms and virtuosic keyboard writing. They represent Scharwenka’s brilliant pianistic style and flair for dramatic nationalistic colors.
The technical demand centers on the large spans and rapid shifts in dynamics required for a truly dramatic performance.
Comparable difficulty and character — good candidates for what to learn next.
Bilder aus Ungarn (Op.26) 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 Bilder aus Ungarn (Op.26) lasts about 15 minutes.
Bilder aus Ungarn (Op.26) 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 Bergfahrt by Xaver Scharwenka, Ballade by Xaver Scharwenka, Barcarolle by Xaver Scharwenka — see the full similar-pieces list on this page.