different between grandiosity vs grandioseness

English

grandiose +? -ity

grandiosity (countable and uncountable, plural grandiosities)

The state of being grandiose (pompous or pretentious).
- 1973, Erich Fromm, The Anatomy of Human Destructiveness, New York: Holt, Rinehart & Winston, Part Three, Chapter 9, pp.202-3,
  […] the narcissistic leader does not use his narcissistic charisma only as a means for political success; he needs success and applause for the sake of his own mental equilibrium. The idea of his greatness and infallibility is essentially based on his narcissistic grandiosity, not on his real achievements as a human being.

grandiose +? -ness

grandioseness (uncountable)

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