Another choice...which one?

I'm not asking for which one looks better, as they are all almost indistinguishable...I'm asking which one's distinguishing qualities are worth the polygons. I will go ahead and say that the double ridges are only really visible when you are zoomed in on the biggest thread, looking at it perpendicular, but honestly, when are you going to be doing that? And is it worth the polygons do that? (you probably want to zoom in...press the magnifying glass above the image).

EDIT: Added isometric side view of threads.