They limit their choices to pre-established organizational goals, policies, and practices. Managers are concerned with process. Leaders dislike mundane tasks. Managers have a strong instinct for survival. Managers can tolerate mundane, practical work.
Managers relate to people according to their role, that is boss, employee, peer, and so forth.
Managers are concerned with achievement of organizational goals. Managers are supervisors, department heads, administrators. They are usually considered the higher echelon. Managers derive power from their positions. They are not comfortable with the status quo of established organizational goals and policies.