"Yes, they're the same mesh with the same poly counts, so you can import morphs from one to another. However,  how those polygons are distributed is different... female has more polys distributed in her breast area than the male. The male has more distributed elsewhere than the female."

Well, "distribution" normally referes to different topology. Like removing vertices from the head and putting them in the feet. That would make any direct morph exchange impossible.

Of course when you morph a mesh, vertices will be morphed closer to each other or spread apart. But the actual structure of the mesh flow doesn't change as otherwise the mesh would overlap and there would be undercuts.

This of course happens with with any mesh that is morphed.

I think we're simply using the same term for two different things.