There are no differences in the grammatical patterning of subjects of the sentences meaning “a person/thing belongs to a certain group of persons/things” (like “Socrates is Greek”) (cf. ) and subjects of verbs which (according to their semantics and/or grammatical features) belong to intransitive verbs of state.
Standardized
The subjects in predications of class membership are grammatically identical to subjects of intransitive verbs of state.
) and subjects of verbs which (according to their semantics and/or grammatical features) belong to intransitive verbs of state. 
See #464.