unequalled vs unequaled

unequalled and unequaled both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unequalled	No	Yes	No	No
unequaled	No	Yes	No	No

As adjectives, unequalled and unequaled are synonyms defined as:

Other synonyms of unequalled include alone, unique, unparalleled.

unequalled (adjective)	unequaled (adjective)
radically distinctive and without equal	radically distinctive and without equal