An Argentine Minimal Piano Sonata by Hernán López Vilar utilizes minimalist repetition and subtle motivic transformation. It is distinctive for its use of static, pulsed rhythms which gradually build in intensity.
The primary challenge is maintaining perfect rhythmic precision throughout the repeating minimalist patterns.
Comparable difficulty and character — good candidates for what to learn next.
An Argentine Minimal Piano Sonata is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 An Argentine Minimal Piano Sonata lasts about 8 minutes.
An Argentine Minimal Piano Sonata 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 12 Variations über die Folie d'Espagne, H.263 by Carl Philipp Emanuel Bach, 12 Variations über die Folie d'Espagne, Wq.118/9 (H.263) by Carl Philipp Emanuel Bach, Bergamasca by Victor Eijkhout — see the full similar-pieces list on this page.