SplitTrack: A split track file with Click/Cues panned LEFT and all instruments panned RIGHT. Not all loops include vocal cues.
MultiTrack: A folder of high quality WAV files for every instrument in the track, including click and cues. This can be imported to Ableton or any other application.
Reason/Ableton Session: You get the original Reason or Ableton session. This includes all the MIDI data, the virtual instruments, etc. You will need that application to edit these files. It may also require rack extensions to fully edit. Recommended for Advanced users.