This étude, often called the 'Winter Wind', is a formidable concert piece requiring immense endurance and precision. It is distinguished by its relentless, cascading arpeggios that frame a noble and majestic melodic line.
The primary challenge is maintaining a clear, cantabile melodic line while navigating the complex, rapid-fire arpeggiated accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
Étude in A minor, No. 11 is rated Henle level 8 of 9 — concert repertoire, roughly diploma level. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 8 — meaning you can already play level 7–8 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 Étude in A minor, No. 11 lasts about 4 minutes.
Étude in A minor, No. 11 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 Ballade No.4 by Frédéric Chopin, Ballade No.1 by Frédéric Chopin, Ballade No.3 by Frédéric Chopin — see the full similar-pieces list on this page.