I'm praying to God you meant Op. 25 No. 2 or 3. . . Maybe 5, but I doubt even that?
The "least difficult" is certainly Op. 10 No. 6, followed by either 25/1 and 25/3.
Most difficult to perform- Op. 25 No. 4, (or, for me, Op. 10 No. 4, for some reason)
Most underrated etude to give a perfect performance of- 25/2, fo shizzle
Most often butchered etude- 10/4, 25/12 or 25/7
Most overrated in terms of technical difficulty- 10/1 or 25/11
Most difficult in general- 10/2, 25/4, 25/6
Etudes I just can't seem to get- 10/4 or 25/10
Just my thoughts.