Spotify sync to same location?
I've done something similar using apps in the one partition on the other. I erased the /Applications folder on one partition and symlinked the master /Applications folder in the other to the root of the partition it was erased from.

So, you could delete the com.spotify.client in all the users but one which will be the master, and then do something like this in terminal.

ln -s /Users/&lt;master&gt;/Library/Cache/com.spotify.client /Users/&lt;nonmaster/Library/Cache/com.spotify.client


Not positive this will work, but assuming the permissions are correct, it might.