No need to apologize because I won't pretend to be an expert myself and we're always learning in one context or another. 🤝

BBKs are normal mechanical keyboard switches with a shorter travel distance of 3.4mm.

Having never used the Alpacca v2, both are 5-pin, but it appears that the Alpacca housings are opaque (and not clear), meaning that you'll lose out on the RGBs at the switch location.

Here's a picture of the Halo 65 with all the switches pulled. You'll see a north-side RGB at each switch location that the Alpacas would presumably block.

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https://preview.redd.it/csu7z7zoot0a1.jpeg?width=3840&format=pjpg&auto=webp&v=enabled&s=9e684fc47f51dbac3f520d78c4f24d9308aaa8b6