experiential vs existential

experiential and existential both are adjectives.

Word	Noun	Adjective	Verb	Adverb
experiential	No	Yes	No	No
existential	No	Yes	No	No

As adjectives, experiential and existential are synonyms defined as:

experiential and existential: derived from experience or the experience of existence

experiential (adjective)	existential (adjective)
relating to or resulting from experience	relating to or dealing with existence (especially with human existence)
derived from experience or the experience of existence	of or as conceived by existentialism
	derived from experience or the experience of existence