Great sequence of images tally with my general experience:
Basically:
- 1/100 looks slushy, grey and indistinct “cords” (not flakes/lumps)
- 1/500 looks crisp – can see individual snow flakes/lumps falling
Also, from my own experience, is best to focus on 2 metres or so away. Focus matters since DOF small when aperture maxed as one may do to allow max shutter speed (depending on lighting conditions, most likely overcast)