If the Security and Valet settings are working, then the rest of the settings are as well. As far as difference in performance, well..........the Ultimate provides the foundation (chip-wise) for huge performance gains. It won't give you a whole bunch of power increase by itself, but when used with other proven mods, it will allow for the power potential of your build to be utilized.
Also, keep in mind that while other cars can have gobs of boost and timing safely added to the tune, our trucks don't adhere to that guideline. There are other things that must be done first to allow the Ultimate to work to it's fullest. And while it may work for your Audi......cranking the boost and/or timing on our trucks simply won't do the trick (for long).
Michael