inquisitiveness vs perspicacity

inquisitiveness and perspicacity both are nouns.

Word	Noun	Adjective	Verb	Adverb
inquisitiveness	Yes	No	No	No
perspicacity	Yes	No	No	No

As nouns, perspicacity is a hypernym of inquisitiveness; that is, perspicacity is a word with a broader meaning than inquisitiveness:

inquisitiveness: The quality of being curious and interested.
perspicacity: the capacity to assess situations or circumstances shrewdly and to draw sound conclusions

Other hypernyms of inquisitiveness include judgement, judgment, sound judgement, sound judgment.

inquisitiveness (noun)	perspicacity (noun)
The quality of being curious and interested.	the capacity to assess situations or circumstances shrewdly and to draw sound conclusions
a state of active curiosity	intelligence manifested by being astute (as in business dealings)