The power of Stylus RMX is adding SAGE Expanders (third-party or Spectrasonics official). Each expander appears as a new top-level folder.
You can import REX files (.rx2) into Stylus RMX to build your own user library. stylus rmx library
This is Spectrasonics’ secret weapon. You can take a standard rock beat from the library, dial in 15% "Dynamic" Chaos and 5% "Feel" Chaos, and the engine will generate thousands of unique variations of that beat—automatically. You cannot do this with standard audio loops. The power of Stylus RMX is adding SAGE