merged vs unified

merged and unified both are adjectives.

Word	Noun	Adjective	Verb	Adverb
merged	No	Yes	No	No
unified	No	Yes	No	No

As adjectives, merged and unified are synonyms defined as:

Other synonyms of merged include incorporate, incorporated, integrated.

merged (adjective)	unified (adjective)
formed or united into a whole	operating as a unit
	formed or united into a whole