This parallel recording compares the very dry, precise studio sound (here in the acoustics of the Teldex studio and the sound of a New York Steinway from the 1950s), with a sound that one might expect in a modern concert hall (here the acoustics of the Berlin Philharmony and a current German Steinway D).
Rachmaninov himself wrote two different transcriptions, one for violin and piano, and one for piano solo.