important vs of import

important and of import both are adjectives.

Word	Noun	Adjective	Verb	Adverb
important	No	Yes	No	No
of import	No	Yes	No	No

As adjectives, important and of import are synonyms defined as:

important (adjective)	of import (adjective)
of great significance or value	of great significance or value
of extreme importance; vital to the resolution of a crisis
important in effect or meaning
having or suggesting a consciousness of high position
having authority or ascendancy or influence