If the gravitational field strength is numerically equal, it means that the magnitudes of the gravitational field vectors at those two points are equal, but they might have different directions. The numerical value of the gravitational field strength represents the force experienced by a unit mass placed in the field. Therefore, if two points have the same numerical value for the gravitational field strength, it means that a unit mass placed at those two points would experience the same amount of gravitational force, but the direction of the force might be different.
