4 Does it matter if you use ArcoLinuxD or ArcoLinuxB to get Herbstluftwm

It does not matter whether you are using ArcoLinuxD or ArcoLinuxB.

In the next video’s you will see that I will work on an ArcoLinuxB-Herbstluftwm virtualbox.

ArcoLinuxD or ArcoLinuxB are essentially the same thing.
The delivery system is just different.

ArcoLinuxD installs a base system then you install the rest with scripts.

ArcoLinuxB installs all packages at once via an ISO.