Yes, they are, but both might be wrong answers to the question of how to share to a limited number of people. For example if I would like to share with my coll

Yes, they are, but both might be wrong answers to the question of how to share to a limited number of people. For example if I would like to share with my colleagues I would much prefer a centrally organized group instead of everyone keeping their own "work circles" up to date (eg when new interns come and go).