blue ribbon jury vs special jury

blue ribbon jury and special jury both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue ribbon jury	Yes	No	No	No
special jury	Yes	No	No	No

As nouns, blue ribbon jury and special jury are synonyms defined as:

blue ribbon jury and special jury: a jury whose members are selected for special knowledge for a case involving complicated issues

blue ribbon jury (noun)	special jury (noun)
a jury whose members are selected for special knowledge for a case involving complicated issues	a jury whose members are selected for special knowledge for a case involving complicated issues