Just for the record:

Here's V4 LOD 1K: Heart of gold, but a bit rough around the corners. Better render here with polygon smoothing rather than subdivision, as the SubD algorithm will make her look too skinny:

Here's V4 LOD 4K: Great personality, as she already has enough polygons in her head to have actual expression morphs. She has prop teeth and, like 1K above, no (sculpted) toes.

17K otoh is already "fully formed" and fully morphable. In fact, regular V4 is just a subdivided 17k with the subdivision permanently "baked" in.