To make it clearer, a point is the XYZ in a Cartesian coordinate system. A vector is the difference between 2 points, either expressed as the XYZ differences (coordinate vector) or the angle and distance (polar vector).

As an example, see attached. A line (vector) from point A to point B.

The Vx is the calculation of the coordinate vector (referred to as the Delta of a line segment), while the Vp is the calculation of the polar vector (the length and angle of a line segment).