In your case, you can use either one, hobby or industrial. If your PC on a machine with the industrial license that goes bonkers, we will work with you. The main intent on the industrial licensing is that we would like to have 1 license per machine. If your PC on that machine went bonkers and is no longer operational and you had to throw another PC on it, that would not be a conflict.
You say you don't need macro B, but you may like it. Never know unless you try it.
You can move a Hobby profile to Industrial. And then you can add in the industrial features to that profile. However, once you do that, you really can't move that profile back to Hobby because the industrial features that you used simply won't be there anymore. But about the only thing that happens is the industrial features disappear from the profile, so no biggie.
If you have several machines, then I would think about putting industrial on you most capable machine and hobby on all of the rest. You got it, might as well use it.

As to copying the profile, if you package it up, then everything needed to run that profile is included (screen set, macros, tool table, parameters, etc...) with the exception of custom files that may be in the Modules directory.
Steve