Be careful with soap, some synthetics binders do not react well with soap.
The 6k should have a more refined bevel and edge. Lots of deep 1k stria going all the way to the edge, ending in a chip.
After bevel setting, (you are absolutely sure the bevel is fully set from heel to toe), the second most important stone is the transition stone. Where you go from grinding the bevels flat and meeting to polishing the bevels and straightening the edge.
The goal of the transition stone, (whatever the next stone after bevel setting is), is to polish out ALL the deep bevel setting stria, all of it.
Deep stria end in a chip at the edge, if you do not remove all the deep stria, or at least all the deep stria that reach the edge, it will fight you all the way to the finish. You may even get a shaving edge, but it will be weak and may start to chip or crumble after stropping.
Try a little slurry on the 6k to make it more aggressive and use some circles to remove the deep stria. Finish with X strokes on a clean no slurry stone to bring back the edge and make the stria uniform. Any deep stria should show up under a uniform 6k stria pattern.
There is a recent post on perfecting a 5k bevel, this is exactly what he is talking about.
On the Jnat bevels you can see some of the deep stria on the right-hand side of the bevel. Once you polished away the Kazumi bevel with the Ark the deep stria became visible, they were never removed just masked by the Kazumi bevel.
Stropping on linen between stones will also help to refine the edge, removing any flashing so you are honing to a clean edge.
An Ark edge should be laser straight.
You must get rid of all the deep bevel set stria on the 6k, then build the edge.
Now if the Jnat is aggressive, it should remove all the deep stria with a thick diamond or Tsushima slurry.
I find it easier to take a near mirror bevel to a Jnat or Ark, then there is no question that the Jnat removed all the deep stria.
Once you get a smoking Jnat edge, (test shave), then put an Ark edge over it and see if the shave is improved. If so, reverse the pattern, put a smoking Ark edge on it, test shave, and lay a Jnat edge over it. The shaves will tell you if you are going forwards or back.
Super hard to tell looking at photos which edge will shave better. To me an Jnat and Ark are not better than the other, they are different, but shave better than slates and synthetics.
Both the Jnats look aggressive, it that Diamond slurry?
If so, test by setting a 1k bevel, then removing all the 1k stria with just diamond slurry, work the slurry to thin and finish. You will learn a lot about you Jnats. Then start adding Nagura once you know what the base stone alone is capable of.
You are close, more time on the 6k or the Jnat.
The 6k should have a more refined bevel and edge. Lots of deep 1k stria going all the way to the edge, ending in a chip.
After bevel setting, (you are absolutely sure the bevel is fully set from heel to toe), the second most important stone is the transition stone. Where you go from grinding the bevels flat and meeting to polishing the bevels and straightening the edge.
The goal of the transition stone, (whatever the next stone after bevel setting is), is to polish out ALL the deep bevel setting stria, all of it.
Deep stria end in a chip at the edge, if you do not remove all the deep stria, or at least all the deep stria that reach the edge, it will fight you all the way to the finish. You may even get a shaving edge, but it will be weak and may start to chip or crumble after stropping.
Try a little slurry on the 6k to make it more aggressive and use some circles to remove the deep stria. Finish with X strokes on a clean no slurry stone to bring back the edge and make the stria uniform. Any deep stria should show up under a uniform 6k stria pattern.
There is a recent post on perfecting a 5k bevel, this is exactly what he is talking about.
On the Jnat bevels you can see some of the deep stria on the right-hand side of the bevel. Once you polished away the Kazumi bevel with the Ark the deep stria became visible, they were never removed just masked by the Kazumi bevel.
Stropping on linen between stones will also help to refine the edge, removing any flashing so you are honing to a clean edge.
An Ark edge should be laser straight.
You must get rid of all the deep bevel set stria on the 6k, then build the edge.
Now if the Jnat is aggressive, it should remove all the deep stria with a thick diamond or Tsushima slurry.
I find it easier to take a near mirror bevel to a Jnat or Ark, then there is no question that the Jnat removed all the deep stria.
Once you get a smoking Jnat edge, (test shave), then put an Ark edge over it and see if the shave is improved. If so, reverse the pattern, put a smoking Ark edge on it, test shave, and lay a Jnat edge over it. The shaves will tell you if you are going forwards or back.
Super hard to tell looking at photos which edge will shave better. To me an Jnat and Ark are not better than the other, they are different, but shave better than slates and synthetics.
Both the Jnats look aggressive, it that Diamond slurry?
If so, test by setting a 1k bevel, then removing all the 1k stria with just diamond slurry, work the slurry to thin and finish. You will learn a lot about you Jnats. Then start adding Nagura once you know what the base stone alone is capable of.
You are close, more time on the 6k or the Jnat.