the author, Courtney Ackerman, a researcher for the State of California, suggests that:
". . . self-belief is a necessary—but not sufficient—component of self-confidence. You must have at least some degree of self-belief to have self-confidence, but simply self-belief does not necessarily guarantee you self-confidence."
Self-efficacy describes our judgement about our ability in specific tasks or activities. Self-efficacy makes a big difference in times of transition. It can affect whether you apply for a job that you feel might be a bit of a stretch. On the other hand, Self Belief on the other hand is the way you feel about yourself regardless of your achievements, looks or other things you may feel confident in.
Self-belief is the positive feeling you have inside that you are capable of anything as confidence in your own skin, abilities, or judgment. While self-efficacy refers to people's beliefs about their capabilities to exercise control over their own activities.