Put my recently bought watanabe nakiri on the stones for the first time, and it came out with a better edge than the carter muteki I sharpen the same way. Shapton pro 1k, raised a burr along the length of the edge on one side, then the other. Same thing on shapton pro 5k. A few strops on the 5k, then on leather with 1 micron compound. More aggressive angle on the muteki. In every test - tomato skin, grapes, fingernail, paper - the wat feels ever so marginally better. And its length and geometry made it so simple to sharpen, too, no more than a few minutes. Perhaps that explains why I had more success with it? I recall the muteki having an impressive edge when I first got it, but it's already been a while so I can't say for sure.