Misonos come out of the box with a weak, overly convexed edge, due to the factory buffering. First thing to do is getting rid of it. When you get it in the States, go with Korin and ask for their free initial stone sharpening. By the way, they are quite asymmetric. If you were a left-handed, order the inverted version. It's worth the premium you pay. Better solution than having only the edge neutralised.
Haven't handled the 210 from this series, but I expect it to be quite narrow. Please verify.
One of the UX-10 qualities is the bite it keeps even after some dulling. Some will experience this as good edge retention. The work of the large, evenly distributed carbides. The same that give it its abrasion resistance.
Sharpening is no fun. Forget about polishing, above 2k for deburring only.
As usual with Misono F&F are excellent. I do like the unusual design, but that's very personal.