Three-section orbs

[oshfdk]

I'm probably not very good with assessing images and certainly 10 years late to the party, but is there a specific list of similarities between two drawings? On the surface of it, if a T-O map commonly represents the Earth, located at the center of the cosmos, and the undulations are a way of representing Empyrean or Primum Mobile (not my vocabulary, I just asked ChatGPT what wavy lines outside the fixed stars sphere on a medieval chart could represent, I was thinking more like God's realm or chaos), then there is not that many different ways of drawing the whole cosmology. What other similarities am I missing?