A mentor is typically someone who has been in the role before. You go to him for advice or they can give you their perspective/ experience about things
A coaching relationship is different. They hold space for you, ask questions to help you figure out what’s best for you.
I sometimes visualize meeting one person as the equivalent of meeting the Ocean’s 11 crew together at once, wrapped up in one human envelope—we each have distinct parts, and we tell a story to ourselves and the world that they are a coherent whole, but depending on the context different parts step forward into the light on the stage.