Manning,
Yes to all of your questions.
No difference in settings that I can tell although RB & Audition output buffer is the same Audition has an additional setting for the amount of buffers. RB doesn't have this. It must be preset.
Audition also has a wave cache that is configurable. There is a check box to use system cache that is unchecked. I assume RB uses system cache. At the moment the Audition cache is at 16384K bytes.
Watching task Manager as I removed tracks from the project the memory usage would drop. When I load tracks in RB the memory usage stays the same.
So Audition is loading the tracks into memory? & RB is streaming from the disc?