Another "compare the relative difficulty of..."

[steinwayguy]

The first movements of:

Liszt Concerto No. 2 in A Major ("1st movement")
Beethoven Concerto No. 4 in G Major
Tchaikovsky Concerto No. 1 in B-flat Minor
Rachmaninoff Concerto No. 2 in C Minor
Rachmaninoff Concerto No. 3 in D Minor
Chopin Concerto No. 1 in E Minor
Bartok Concerto No. 3
Prokofiev Concerto No. 3 in C Major


I'm particularly interested in how Liszt and Rachmaninoff Third stack up against the rest of them...

And please don't feel like you have to rank them all, just a few that you know or know about...