You may have the same faith calling as others in your chosen vocation. (I’m not the only Christian in broadcast journalism, for instance.) You might even have the same general vocational aims (just as Peter, Andrew, Paul, and Ananias had the vocational aims of sharing the Christian faith). But because you have different skills and gifts, different curiosities, and because different people have spoken into your life (which is to say nothing of the differences in your life experiences), your vocational calling is unique to you.