I think it ends up who forge it, because of heat treatment.
Similar with me, and one of my first 2 or 3 stones. I still keep it because, well, it's a good stone and maybe a bit of nostalgia. (Mine might also
Here's another pic of alloy banding on Kikuichimonji, probably a white.
It's nice to see somebody besides Kramer getting some good press :- )
I would go all in and pick the blue steel knife. A kono honyaki should (be abel to) have a very thin profile = good cuttier. Therefore i would go with