Location: Extracts the X, Y or Z coordinate of the point you snap to. The coordinate is dependent on the Filter setting. The coordinate system is based on the Alignment setting.
Distance: Extracts the distance between two points. The Filter setting controls whether the distance is measured in the X, Y, Z directions, in the XY plane (2D filter) or in 3D. The coordinate system is based on the Alignment setting.
Same as: Extracts the radius or diameter of a circle or an arc. With the depth filter enabled, the depth of a feature is extracted. Note that in the case of blind holes the overall depth of the hole is reported. This includes the extra depth to represent the drill tip.