egoistic vs egoistical

egoistic and egoistical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
egoistic	No	Yes	No	No
egoistical	No	Yes	No	No

As adjectives, egoistic and egoistical are synonyms defined as:

egoistic and egoistical: concerned chiefly or only with yourself and your advantage to the exclusion of others

Other synonyms of egoistic include egocentric, self-centered, self-centred, self-seeking, self-serving, selfish.

egoistic (adjective)	egoistical (adjective)
concerned chiefly or only with yourself and your advantage to the exclusion of others	concerned chiefly or only with yourself and your advantage to the exclusion of others