Hmmm... I'm not getting the gist of your post. I realize under the NEC it is possible for circuit conductors to be both branch and feeder, though some may disagree. But I don't see how your scenario has any branch/feeder circuit and using that terminology make your post hard to comprehend from an NEC-interpretation perspective.The first circumstance describes two branch/feeder circuits
IMO the second circumstance has only one OCPD for the branch/feeder circuit & the secondary protection is in the control box.