holographic vs holographical

holographic and holographical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
holographic	No	Yes	No	No
holographical	No	Yes	No	No

As adjectives, holographic and holographical are synonyms defined as:

holographic (adjective)	holographical (adjective)
written entirely in one's own hand	written entirely in one's own hand
of or relating to holography or holograms
written wholly in the handwriting of the signer