I guess for me the biggest difference compared to a Charybdis is that it’s a professional product.
I love the Charybdis as a project, but due to the price, I would rather go for something that can resist the test of time.
I’ve had a few Kinesis boards, and honestly the build quality wasn’t there for the price of competitors. I’m running a ZSA moonlander now and it is a significantly better experience than I had with the split boards from K.