spruced up vs spiffed up

spruced up and spiffed up both are adjectives.

Word	Noun	Adjective	Verb	Adverb
spruced up	No	Yes	No	No
spiffed up	No	Yes	No	No

As adjectives, spruced up and spiffed up are synonyms defined as:

Other synonyms of spruced up include dolled up, dressed-up, dressed, dressed to kill, dressed to the nines, togged up.

spruced up (adjective)	spiffed up (adjective)
dressed in fancy or formal clothing	dressed in fancy or formal clothing