Franz Liszt's 3d piano concerto in E Flat Major?

http://www.amazon.com/Franz-Liszt-Concerto-Profundis-Totentanz/dp/B0000030SU How much is known about Liszt 3d piano-concerto in E Flat Major??? Comparing it to the other two (No. 1in E Flat and No. 2 in A) would you say it is more difficult technically, less difficult or about the same??? Why is it not so... show more http://www.amazon.com/Franz-Liszt-Concerto-Profundis-Totentanz/dp/B0000030SU
How much is known about Liszt 3d piano-concerto in E Flat Major???
Comparing it to the other two (No. 1in E Flat and No. 2 in A) would you say it is more difficult technically, less difficult or about the same???
Why is it not so popular like the other two???
3 answers 3