As a mirror to the previous entry, this piece emphasizes the percussive potential of the piano within a complex time signature. It is musically notable for how it maps abstract, non-standard pulses into a performable piano structure.
Maintaining a crisp articulation through the rapid grouping of pulses is the most significant challenge for the performer.
Comparable difficulty and character — good candidates for what to learn next.
11/8 is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
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.
11/8 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 11/8 by Peter McKenzie Armstrong, 12 Variations in S-Mode, for piano solo by Peter McKenzie Armstrong, 12 Variations in S-Mode by Peter McKenzie Armstrong — see the full similar-pieces list on this page.