How does "Renaissance Music" compare to the sound, instruments used in "Clical Music"?

Renaissance music is not the same as music from the Clical period, but many people use the umbrella term "clical music" to describe all music which was written before the 20th century. For some useful tips on the difference between Renaissance and Classical see a href="http://blog.mymusictheory.com/?p=169." rel="nofollow"http://blog.mymusictheory.com/?p=169./a