I'm a bit confused as to Group Intercom vs Multi Way Intercom.  What are the advantages/disadvantages of each?  When should i use one vs the other?

Group Intercom can only be setup using phone App?

On the Phone App, what is the Pairing List for and what should it show?

When I'm in a group Intercom or Mutli Way Intercom am I still able to initiate a two way intercom with one person?  So can i have a side conversation temporarily with one individual then return to Group or Multi Way?  Does this differ whether I'm the leader (the one who initiated) vs just a participant?

and Finally, I believe i understand the music sharing/GPS/FM Radio cannot be done in Group Intercom.  Can it be done in Multi Way intercom?  So all participants can hear GPS directions?