What you have to remember is that “Corsican” and “Genoese” were not necessarily distinct categories. Consider Pier Maria Giustiniani, commissioner-general of Corsica up to the fall of Bastia. He was born and raised in Bastia. But his family is absolutely Genoese - a Giustiniani had commanded the Genoese forces at the Fall of Constantinople, and his ancestors had administered the Genoese colony of Chios. Pier Maria himself served as Bishop of Ventimiglia (in Liguria) and his family rose to powerful positions in the government of the republic. Nobody would question that Giustiniani is Genoese. The Buonaparte family, in contrast, is recognizably Corsican; they were of Corsican origin and treated as Corsicans by the republic, which is why despite being big men in Ajaccio they attained no office in the Genoese administration.
But there was a grey area between the likes of the Giustiniani and the Buonaparte in which “Corsican” and “Genoese” identities were not always so clearly differentiated. Domenico Rivarola, for instance, came from a continental Genoese family but moved to Corsica and married a native Corsican. He served as a bureaucrat in the Genoese administration but ended up siding with the revolutionaries. Does he count as Corsican, or Genoese? If he had been a loyalist instead of a rebel, would that change your answer?
One effect of independence is to annihilate this ambiguity. It’s not longer possible to exist in that grey area of Corso-Genoese identity; you are either one or the other. And as long as the Corsican constitution specifically states that no Genoese shall reside in the kingdom, your choice of identity may also determine whether you’re able to remain in your home or be forced into exile. For some families, the decision will be easy: the Buonapartes are certain to stay, and the Giustiniani are certain to leave. But it won’t be that simple for many. It will be particularly difficult for the residents of Calvi and Bonifacio, cities which are still largely Genoese settler colonies. As far as the Calvesi are concerned, Calvi is Genoa, but the new Corsican government says otherwise. So do they remain in the city where their family has lived since the Middle Ages and try to reinvent themselves as Corsicans, or do they turn into Genoese pieds-noirs and flee to the continent? Every family will have to make its own decisions.
Smacks of Loyalists and Patriots after the American Revolution. Guess Genoa's getting a nice influx of newly beggared peasants.