I think neither Liszt's or Chopin's etudes, improve your technique in the slightest. For me, I've experienced it when I played them once in a concert (the Chopin etudes) and actually thought: "What am I doing. I am playing a set of so-called technical/musical exercises which are actually not so much precisely that." After this I never played them again, and nowadays I only play them for myself in a moment in which I really don't know what to play else.
By the way, stop with these threads. You won't learn anything from it.
Anyway, my experience as to the order of difficulty (and to be a terrible contradict of my own post) was:
Etude in E major op. 10,3
Etude in e flat minor op. 10,6
Etude in A flat major op. 25,1
Etude in f minor op. 25,2
Etude in c sharp minor op. 25,7
Etude in G flat major op. 10,5
Etude in C major op. 10,7
Etude in A flat major op. 10,10
Etude in f minor op. 10,9
Etude in E flat major op. 10,11
Etude in F major op. 25,3
Etude in G flat major op. 25,9
Etude in c minor op. 10,12
Etude in a minor op. 25,4
Etude in e minor op. 25,5
Etude in D flat major op. 25,8
Etude in a minor op. 10,2
Etude in c sharp minor op. 10,4
Etude in F major op. 10,8
Etude in c minor op. 25,12
Etude in C major op. 10,1
Etude in g sharp minor op. 25,6
Etude in b minor op. 25,10
Etude in a minor op. 25,11
BW,
Glenn