As an NCO, What are the differences between servant leadership and followership? Do they need to coexist?

The bumper sticker for servant leadership is that the leader subordinates themselves to the needs of the organization . It is not about them, it's about accomplishing that mission and supporting its people.

Followership is a subset of leadership. There is always someone incharge of you. You are never leading in isolation. You must be a good follower as well as a good leader. Two sides of the same coin

Before answering I am inclined to ask are you by chance at BLC? That question sounds oddly similar to one I remember a paper being written on.