I disagree. Both these stones have been rubbed with an Atoma 1200 diamond plate every time they are used. 2 years now. As you can see, no coarse scratches. The diamond plate may be a little scratchy when new but not when broken in.
Oz that is not my experience, my Atoma leaves a lot of scratches, and I have had it for a year now.
Also the scratches can be seen only when the stone is dry.