My understanding is that the feel is different to any, but the keys are very stiff, even more so than alps white. My least favorite out of all of these is probably alps white due to the stiffness, and it seems like you have to slow your typing to actuate, kind of like the matias clicky.
Also, I'm watching a unicomp on ebay that's a lot cheaper than one from a store, but it's a Japanese board (with english characters). Will this work with an english O.S? It would kill two birds with one stone as I intend to learn Japanese and you can switch between that and English, but I want to also use it as an english board that you can just plug in and type, without having to set something special up or press a certain key. I'm aware that you have to press key combinations for certain symbols on the number keys.