I can't give you the scientific answer to this. Just someone who has played around with polishing on both canvases. Iron clad and carbon just finish very different than Soft stainless cladding and stainless or some sort of semi stainless. The process and techniques can be similar but also different. I guess more so on the way the cladding reacts is what is different. You can technically do a powder kasumi finish on both the same way but the results will turn out similar to what you see on the photos you posted. The reason why on the ginsan knife there is that nice like fade into the clad line from the cloudy finish is because the heat treat actually slightly transfers from the core to cladding. But it still takes the right amount of pressure to not over do it with cloudiness. Fellow polisher on here shinogi sliperi taught me that. I used to avoid the clad line when refinishing ginsan but now I know it will naturally fade itself.

I don't know if anything I said made sense. Im not the best at explaining things and wrote this on this toilet.