One of these things is just like the other...

Take away a person's right to defend themselves because somebody unrelated did something...with a different weapon...which they were already banned from having
Vs
Don't kill tiny babies that you voluntarily chose to conceive.

Pretty different in my eyes

Two tiny minorities of noisy, narrow-minded zealots hell-bent on misusing the powers of the State to impose their depravity on the people who disagree with them. Seems pretty similar to me. They even use similar arguments: "The evil guns-slash-abortion is harming the little children. We've got to outlaw the evil guns-slash-abortion to protect the little children."