senior status vs higher status

senior status and higher status both are nouns.

Word	Noun	Adjective	Verb	Adverb
senior status	Yes	No	No	No
higher status	Yes	No	No	No

As nouns, senior status and higher status are synonyms defined as:

senior status and higher status: higher rank than that of others especially by reason of longer service

Other synonyms of senior status include higher rank, seniority.

senior status (noun)	higher status (noun)
higher rank than that of others especially by reason of longer service	higher rank than that of others especially by reason of longer service