Your prelude and fugue is very good for auditions. It is not done too often and is very difficult.
You should be worried about your Beethoven Sonata and Scherzo, for they are both played by about every other person. The real reason the Waldstein is not a good piece for auditions is because it doesn't show off anything. They ask for it, you play some chords and a couple scales, then you're done.
The Etude is fine because I doubt anyone else will be playing it.