A leader has to manage those he is leading, but that may consist largely of delegating tasks or responsibilities to managers who are subordinates. A manager might also lead but might only be a leader by delegation in a subordinate capacity. Leadership also requires self-management.
In administrative work and in personnel management, the difference between the concept of manager and management leader may be small or there may be no difference at all in a particular situation in a financial, public or other financial company or institution. A manager can be a management leader if he does his job well in personnel management. However, not every manager becomes a leader. The management leader and at the same time the manager can also be a mentor and trainer who trains other managers with, for example, less experience in personnel management, how to improve the management process of a team of employees.
Leader is derived from lead and Manager from manage therefore empathy with manager. Leader is by borne and promoted by genetics whereas manager is administrator.