It appears that the daughter of Cuba's Vice President has defected from Cuba, and now lives in Tampa, Florida. See the New York Post story here, courtesy of Agence France Press. If Cuba was really a paradise, they wouldn't have to "fence in" their citizens.
When was the last time the daughter of a U.S. Vice President defected to live in Cuba, or North Korea? We let people come and go pretty much as they please. Do Americans choose to go live abroad? Sure, a few. Do they have to sneak out? No. Can they come home to visit or to live? Sure. A big difference.