
Originally Posted by
fluteman
A classic example is Rachmaninoff's 1st piano concerto. First written as a student assignment to write a piano concerto modeled after Grieg's, it was a success originally, though obviously derivative of the Grieg concerto. His revised version, with more original material, is the familiar one, the better one in the opinion of most (including me), and the original has faded into obscurity. Rach also extensively revised his 4th piano concerto, and there again, the revised version is the generally accepted one.
I would be opening a large can of worms if I claimed it was an improvement, but Ferde Grofe's orchestration of Gershwin's Rhapsody in Blue has become the standard one for performance, although the original version occasionally is performed as well.