One perception many bodies, here all beings have one perception but different bodies.There are sentient beings that are diverse in body and unified in perception, such as the gods reborn in Brahmā’s Host through the first absorption. Santānanda, sattā nānattakāyā ekattasaññino, seyyathāpi devā brahmakāyikā paṭhamābhinibbattā.
This is the second plane of consciousness. Ayaṃ dutiyā viññāṇaṭṭhiti.
the consciousness is a plane, it denotes something more diferent than perception is, regards to how experience is constructed.
while humans have different perceptions and different bodies:
as well we can see that rule is not constricted to realm but is peculiar to humans, some gods, some beings in underworld.There are sentient beings that are diverse in body and diverse in perception, such as human beings, some gods, and some beings in the underworld. Santānanda, sattā nānattakāyā nānattasaññino, seyyathāpi manussā, ekacce ca devā, ekacce ca vinipātikā.
This is the first plane of consciousness. Ayaṃ paṭhamā viññāṇaṭṭhiti.
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it looks like there is Brahma, the big Self, the Host. And retinues of brahma are who has Brahma as host mind.