Yes you are correct its the same as AAA, I have never used it myself yet but as far as Im aware you look for the logo which is on the back of your AA card and show when you are paying and this will get you a discount. Someone with greater knowledge on this will hopefully answer better.
You can find some of the places its accepted on AAA South website, if it asks for a Zip code to enter the site use Disney's 32830 http://www.aaasouth.com/