A "persona" is something that we use to make others perceive or view us in a certain way. So this is something that can be changed consciously to fit a given situation or mood. A "personality" is the defining characteristics of a person, characteristics both public and private, known and unknown by others. So some people might have the type of "personality" that allows them to easily change their "persona" to fit a given situation or location, while other peoples personalities might be more rigid or less creative and so they might be unable to, or unwilling to, put on a different persona to fit other situations. Basically a "persona" is something we want other people to see. our "personality" is something people may have to discover for themselves with effort.

Persona: How one presents oneself to others or how one is perceived to be by others. Eg: He has an outgoing public persona, but he is actually a quiet introvert. Personality: Intrinsic, it's the real you. He has a cheerful and outgoing personality; he's always like that, it's not just for show!