RG's have a larger tactile bump than the BBKs, so in turn they kind of feel a bit heavier because of that bump, but I honestly find them more satisfying to press than the BBKs

Yup! The build quality, the sound, the unique switch options and great keycaps I find are all superior to the equally priced keychrons/glorious keyboards. The only hiccup is no Via/qmk support

Definitely compatible with Alpaca's. I've tried a couple of switches with the same coloured housing and it honestly doesn't effect the rgb much at all