Slurry produces a slightly rounded edge. Bart has a very good write up on honing w/ slurry. In it he dilutes the slurry as he go until he is using just water. The results are dependent on how thick a slurry you start with and how fast you dilute the slurry. Search for 'One Coticule Honing'. It take a bit more observation and practice to master IMHO.
p.s my Thanks button isn't working in this thread. Thanks for your further description behind this thread.