What is unique or rare about the VM Zodiac signs?

[Koen G]

Marco once posted a superb Leo parallel from a bestiary-like scene, but I'm unable to retrieve it at the moment. I remember that I found it superior to other parallels, though the style was still different.

Anyway, for the thread I'd add: 
Gemini unique: laced boots
Sagittarius unique: idle crossbowman (not aiming, shooting, reloading...)

Scorpio RARE: four mammalian legs.

I'd first have considered this unique, but both Marco (left) and JKP have posted an example before: