This set of variations by Petrini explores the popular Folies d'Espagne theme through a series of decorative and technical transformations typical of the late 18th century. It is distinctive for its idiomatic keyboard writing that bridges the gap between the harpsichord style and the emerging fortepiano.
The primary challenge is maintaining clarity and evenness in the rapid sixteenth-note passages while executing historically informed ornamentation.
Comparable difficulty and character — good candidates for what to learn next.
12 Variations on Les Folies d'Espagne (Op.28 No.2) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 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 12 Variations on Les Folies d'Espagne (Op.28 No.2) lasts about 8 minutes.
12 Variations on Les Folies d'Espagne (Op.28 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 Piano Sonata No. 16 in C major by Wolfgang Amadeus Mozart, 12 Variations on "Ah vous dirais-je, Maman" by Wolfgang Amadeus Mozart, Maple Leaf Rag by Scott Joplin — see the full similar-pieces list on this page.