SEPERATED AT BIRTH? (in dif'rent centuries, of course)
Beethoven, when discussing his 'Moonlight Sonata':
The work was very popular in Beethoven's day, to the point of exasperating the composer, who remarked to Carl Czerny, "Surely I've written better things."
Leonard Cohen, when discussing his 'Hallelujah':
"I think it's a good song, but I think too many people sing it."
Both quotes are taken from Wikipedia