What is the similarity between your avatar and the above avatar?

Both are more powerful than they look.

Huh.

Both have lots of black in their appearance.

Both have a calm expression on their face.

Both are females

Again, both are women.

Both have XX chromosomes.

Both have pinkish hair.

-inhales-

-says a bunch of spoileriffic details from both series in rapid fire-

They are both from the Nasuverse.

Both are female.

Both are alive!

Both are colossal. Ish.

Both contain purple.

Both display a full spectrum of colors.

Both are helluva challenge to fight in combat.

Both know how to dual-wield weapons (or arm-blades).

Both are reasonably badass?

Both are Puella Magi.

Both are not in a very good mood.

Both exist in a virtual reality.

Both aren't human and... that's probably it.

Both are monsters on their own right... Even if one is biological and the other mechanical.

Both use Powered Armour.

Both are mere Mooks.