This suite demonstrates Toch's rigorous 20th-century craftsmanship and his penchant for concise, motoric rhythms. It is characterized by its sharp harmonic bite and unconventional phrasing.
The primary challenge is balancing precise rhythmic articulation with the often jagged melodic lines.
Comparable difficulty and character — good candidates for what to learn next.
Bunte Suite (Op.48) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 Bunte Suite (Op.48) lasts about 12 minutes.
Bunte Suite (Op.48) 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 Bergamasca by Girolamo Frescobaldi, Capriccio XV in F major, FbWV 515 by Johann Jacob Froberger, Caprice for Piano by Max Reger — see the full similar-pieces list on this page.