They're pretty different boards. For me the number one thing that made me get a K-Type was the hot-swappable switches, which the WhiteFox obviously doesn't have. Yeah there are a few other boards out there with hot-swappable switches, but not with (quality control issues aside) high-quality aluminum construction, etc. It has become my go-to keyboard because I'm using it to try out as many different switches as I can. Trying them out in a real typing scenario I mean, not just with a tester or something (which I don't find that valuable).
The WhiteFox looks like a nice, smaller form-factor keyboard that doesn't have Massdrop involved so hopefully shouldn't have the same QC issues. But of course it's never going to fill that glorified switch tester (in a good way) role the way the K-Type can.
Honestly with better stabilizers, better keycaps, and some praying that you don't get some of the random problems with these boards that have popped up the K-Type can be a damn fine keyboard. But that's a lot of conditions on top of an already expensive board that make it hard to recommend. But then that doesn't really apply to you since you already have one.
The question is, what are you unsatisfied with about the K-Type? Most of its issues can be fixed with a little work. Unless you really just want the smaller form factor, in which case sure, get both.