Other than the color it's hard to tell them apart.
My guess is that you might want to try more Jnats.My estimates are based on what I'm seeing in the resulting edge and scratch patterns.
I used the nagura with 0.5um film, and the resulting edge is still most strongly affected by the slurry particles (I have to see if I captured an image).
My personal, and very limited experience is that a JNat simply does not finish to as high a refinement level as is possible with uber films/pastes. I gave that JNat edge a shave, and it felt pretty similar to an edge I would get off the 3um film itself, a bit better than that, again, if I were estimating I'd say the finish level of this JNat edge would be a straight up 2um finish.
I'm on my iPhone at the moment, I'll try and post more data later.
+1,I think the main stone plays a part in the slurry breakdown, and I believe it also releases new particles at the same time - so the Awasedo must be factored into the equation. Those particles, I believe, do not all break down identically so there's another variable.
I think someone might do a better job than I can on a Jnat.
What is interesting to me is you prefer more refinement on finer grit, while I kinda like it the way it is. This is despite my love of CBN. Or are you reverse psychology-ing me?
1) 'Steel on Stone' - what works for me. Call it a primal thing or something.
2) Lapping film - while I'm sure it works very nicely - it seems kind of like trying to buy nice produce from Wal-Mart. It may be great, but the vibe is weird.
3) Lapping film with Jnat slurry - like trying to learn Spanish from an English-French dictionary. A lot of information, but all kind of confounded....