The simple distance also calculates an additional angle W. The angle value depends on the order and the directional vectors of the test features.The deciding factor is the space axis of the 1st test feature and the coordinate system of the simple distance. This defines the reference axis for the angle W.In the XY plane, the reference axis = X.In the YZ plane, the reference axis = Y.In the ZX plane, the reference axis = Z.If you want to check an angle, take the test feature „Angle between features“. Generally, this is the better method