We need to see the KSF dial vs the ZF dial in different color temperature lighting conditions. That will be the true test IMO.
If ZF, with their attention to detail, can nail the brown to gray to almost black depending on lighting, and KSF cannot do the same, then we know who the winner is.
Yes, I think this will be the key, along with some confirmation on the two thicknesses.
At a glance, it's a trade-off on which dial looks better, as the ZF has the elongated lines at the bottom of the dial, and the KMF seems to over-round the corners between the lines, giving it a bit softer look. I think I can also see a bit of the texture in the ZF dial, which I can't really make out in the KMF dial (the pics may just be too dark).
Obviously the date wheel is no comparison. But I do love that KMF have come in at a reported 8.4mm. So it'll be interesting to see some real-world measurements and further pics.