different between globularity vs rotundity

English

globular +? -ity

globularity (usually uncountable, plural globularities)

rotund +? -ity, from Latin rotunditas.

rotundity (countable and uncountable, plural rotundities)

The quality of being rotund.
- 1929, Robert Dean Frisbee, The Book of Puka-Puka (republished by Eland, 2019; p. 13):
  The captain, `Papa Viggo,´ as he is called among the islands, is a fair-haired man, rather under average height, and with a tendency towards rotundity.

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