Looks like DF are noting the ray tracing issues with amd cards in another RT title:
So I am working on a video covering Forza Motorsport reveal and I was just happening to record some semi-related ray tracing reflection footage on PC from another game and I found this. Driver/Gfx people: is there a reason why AMD and Nvidia render reflections here differently?
The plates of the door have a blue highlight here on their top edge on Nvidia that is not visible on AMD. Same settings and location (4K Native, full roughness cut off, glossy reflections).