I was wondering why this etude called "Winter Wind"? To me it sounds much more "revolutionary" than op.10/12. IMO, the "winter wind" suits much more something like Finale of B flat minor Sonata. Personally, I actually against of 'nicknames' for pieces.
I have been playing almost all Chopin etudes for many years, but found that for me the 10/2 and 25/11 are the hardest ones. Only lately (after many earlier attemps of getting back to them) I start getting confidence, so they become "easier". But still, the idea itself of playing them in public brings me into a fear (as also with Feux Follets, and Mendelssohn-Rachmaninov Midsummer Night's Dream Scherzo). I didn't have it with op.10/1 or 25/6... after everyday working on each for a few years.