While both Coaching Supervision and Mentor Coaching aim at developing a coach's capabilities, Coaching Supervision may take a broader, more holistic approach.
Coaching supervision emphasizes interactive reflection. Coaching supervision can contain elements of evaluation, teaching, or tutoring. A qualified coach supervisor is an expert in coach development and has a broader knowledge base than a coach.
Coaching supervision aims at developing you as a coach and the effectiveness of your practice. This includes the development of skills, competencies, and your way of being.