I guess you could also say their powers are somewhat similar with the super strength and I guess JJ is somewhat invulnerable? But their personalities are completely different.

I am on the fence with JJ. Should I finish it? I love Daredevil and want to be 'caught up' with the Netflix universe since Iron Fist and Luke Cage are coming and those sound intriguing, but Jessica is too damn brooding.

As for Supergirl, well it's moving to the CW. That should tell you something.