Yeah, the stones from Aliexpress are the DMD stones and not to be confused with DMT. DMTs are similar to Atoma, some prefer one, some the other. What I like about Atomas is that they don't have to be worn in whereas DMTs can be quite aggressive at the beginning. Also, there are finer DMTs than there are Atomas but above 1000 I prefer the DMDs. I think the DMDs are an amazing high quality product and a real bargain. They perform better or at least as good as the Naniwa diamond stones for a fraction of the price. I am not sure who makes them.
The Gokumyo is available for a little less at toolsfromjapan. But yeah, it is an expensive stone. I think the best cheaper alternative (although maybe slightly less fine and softer) is the Naniwa Super Stone 12K which is finer than most other 12K stones.
My kitchen knives are HAP 40, 1.2562, 52100, Aogami, Shirogami, 1.3505, 1.2008, AEB-L. My folders are M390, S90V, Maxamet, BD1N, D2, 440C. I think theses stones will work any steel.