Villa lobos etudes ranked in difficulty

Just a disclaimer, as I publish this I've only practiced 1, 2, 3, 5, 6, a tiny bit of 7, 8, 10 for a period, 11, currently doing 9 and only performed number 8 once. Number 4 I hear it's hated so much but honestly, as a first impression it doesn't seem that hard compared to 2 and 5

Credit to http://www.ilsottosopra.info/2020/11/17/anniversario-di-morte-di-heitor-villa-lobos/ for the images.