Just got my first ZDP-189 knife yesterday, a Kershaw Blur composite. Also a Blur in CPM-154. I was pretty jazzed about getting both a ZDP-189 and in a composite however, out of the box the CPM-154 was quite a bit sharper and after equal time on my Sharpmaker it's still cutting smoother and with less effort than the ZDP-189.
All I've done with both blades is put them on the dark stones at 40 degrees followed by the F and then UF rods. It may be that the factory grind on the 154 is just closest to my Spyderco angle. May try putting the ZDP on the diamond rods to make sure it's at 20 on each side and go back through the other rods.
Don't know if Spyderco uses a different source for theirs and or a different heat treat and if so that may make the difference as so far I'm not as impressed with the ZDP as I was hoping to be?
That being said I still intend to give a Spyderco model in this steel a try.