As nouns the difference between distinctiveness and uniqueness
is that distinctiveness is the quality of being distinctive, individual or discrete while uniqueness is the state or quality of being unique or one-of-a-kind.
distinctiveness
English
Noun
(-)
The quality of being distinctive, individual or discrete
Something which distinguishes something from anything else
uniqueness
English
Noun
The state or quality of being unique or one-of-a-kind.