User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-173.79.14.220-20120916042533/@comment-4821105-20120917212752

Arrowette - Artemis - Both have admiration with Green Arrow and they look alike.

Damian - Dick - Due to both being Robin while members of The Team and they sort look alike.

Kid Devil - Kid Flash/Aqualad - Like Kid Flash, he got the powers alone and have a origin story that sort look alike and like Aqualad he is also a magical hero.

Secret - Miss Martian - They have lot of similarities like their powers and same personality.

Slobo - Superboy - Clones of their mentors, exept he isnt hybrid.

Sorry for being late i was looking for some facts.