What is the key difference between DistanceCondition and ReachPositionCondition?

What is the fundamental difference between a DistanceCondition and a ReachPositionCondition?

I understand that a DistanceCondition allows the options freespace (to measure between bounding box center or edge, respectively) and alongRoute (to switch between shortest distance and distance along a given route).

If that is indeed the main difference, it seems that the ReachPositionCondition is a sub-set of the DistanceCondition, where the tolerance of the ReachPositionCondition is in fact the value of the DistanceCondition.

Does someone have a different interpretation or a link to previous discussion? I could not find any related ticket. I'd be grateful for clarification.

If there is no real difference, I would propose to deprecate the ReachPositionCondition . As a migration strategy, the ReachPositionCondition could be transformed to a DistanceCondition, the tolerance value could be taken as value of the DistanceCondition.