This looks like an older thread BUT I have owned both the KWI, and the Kinki. I paired them both with Dynaudio C1’s, and in my system the Kinki sounds much better. It took some break in, so be patient. It really opened up and smoothed out the sharp edges after 200 hours or so. It’s got plenty of reserves for the Dyns, and really shows off that lovely tweeter. BTW, I did roll in sparkolabs opamps, and it took the Kinki up a notch. Even more musical, well worth the small effort it took. What’s cool thing to be able to do to change the sound of an SS amp!
The KWI, on the other hand, I found a bit dry, kind of technical sounding with my setup. The thing is super well made, plenty of power, and I owned it for several years until I found the Kinki.