For me sharper and smoother, but this thread is about the Gokumyo so lets keep on track.
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Are we racing the stones?
I think this is not the correct question, because 20-30 laps is not slow at all as far as I am concerned.
What one needs to consider is how the stone works with different steels, and that is where the Gokumyio beats anything synthetic IMO.
What's the progresión you use to get to the 20K Gokumyo?
To be honest, I think on a properly honed and finished razor, a double blind test would have almost random distribution of results vs stone. At that level you're arguing about which car is fastest: a ferrari or a maserati. Sure, there is a theoretical difference in speed, but if you see them zooming past one at a time, you won't be able to say which one was faster.