What is the primary difference between My Downloads and My Wish List?

My Downloads is your personal library of arrangements that you have downloaded and/or purchased in the past. My Wish List is a list of arrangements that you would like to purchase in the future. Every time you see a song that you like, you should add it to My Wish List. Then, when you are ready to purchase some new music, you have a list of possibilities already created, all stored in one location for you.