I can't help in informing you about the ginsan, I think Spoiledbroth has both the forged and the stamped, but I would expect them to be good knives. Question is how they will fit to your hand, and if your cutting styles match with their profiles.
That applies to the equation : individual cook + individual knife.
One thing that I am sure is that Sukenari knives are cheap for their quality and finish compared to other makers.
The Honyakis have different profile compared to the other series, as I can tell from my AS and photos. Honyakis also have a different curve behind and above the heel, not that it matters in action.
One thing that impressed me in Sukenari, both the white 1 and the AS, they seem to be less reactive than the Hiromotos white 2, both in the blade and the foods, and the AS, takes very different color from the Hiromoto AS.
Edge wise, I am very happy with all four.
Sukenari AS, must be similar profile to ginsan, in my hand, feels better for rock chopping than vertical cutting, but performs very fine vertical as well.
But to every person, it is not the same.
Depends on your cutting style, height, many factors