Yes, the “paths map” can be generated based on points length or by UE4 nav length. Points length is referring to the number of points (regions) that an actor must pass through to get to the goal. UE4 nav length also contains a reference to number of points (regions) but also takes in to consideration the navigation length when organizing the final “paths map” array. So points length prioritizes the array from minimum number of points to maximum number of points and the UE4 nav length bake prioritizes the array from the shortest navigation path to follow, to the longest navigation path to follow, regardless of the number of points, though the paths map will still make reference to the number of points in that path.
I hope this isnt to confusing and I would be happy to draw out a visual representation.