The advantages of HD morphs in DS include; not UV dependent - since they are working on the sub-divided mesh vertices directly you can use a single morph with any UV set (in DS the UV set is a per material, not a per texture, setting so it isn't possible to mix and match). real geometry, so morph projection can account for them can move vertices in any direction, not just along the normal, so undercuts and the like are possible they scale, as Razor 42 says, and can be adjusted with a single slider on the root node rather than having to adjust displacement strength across multiple selected surfaces.