Hera vs Juno

Are Hera and Juno the same goddess? In the stories, yes — Ovid's Juno is Hera hounding Io, Callisto and Semele under a Latin name, and Virgil's Juno is still "Jove's sister and his spouse". In loyalties, no — Hera's cities are Argos, Sparta and Mycenae; Juno's is Carthage, and the Aeneid ends with her bargaining for the Latin name of Rome.