different between expiatory vs expiatorious

English

expiatory (comparative more expiatory, superlative most expiatory)

Of or pertaining to expiation.
- 18 January 1549, Hugh Latimer, Sermon of the Plough
  They would have us saved by a daily oblation propitiatory; by a sacrifice expiatory, or remissory.

expiatorious (comparative more expiatorious, superlative most expiatorious)

(archaic) expiatory
- 1673, Jeremy Taylor, Heniaytos: A Course of Sermons for All the Sundays of the Year […]
  schools is understood only to be expiatorious

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