[…] In retrospect it is kinda sad that this design is considered progressive. That a superhero in a leather jacket without a cleavage window and boots instead of ten inch combat stilettos is newsworthy. Unfortunately, we as a society we still have a tendency to draw our comic-book women almost exclusively from male gaze perspective. […]

Supergirl = Kara Zor-El, Kryptonian (New Earth), Cousin of Superman (Kal-EL)

Power Girl = Kara Zor-L (missing the E of EL), Kryptonian (Earth-Two), Cousin of Superman (Kal-L)

Hence Power Girl is NOT a clone from Supergirl.

The cloning rubbish comes from two JLU episodes where STAR Labs created a matured Supergirl clone named Galatea who bears some resemblance to Power Girl.

http://dc.wikia.com is where you can learn all about them if you´re interested.

@ Robert: Dude, I haven’t thought about it. Is that what comic books have come to now?

Power Girl is a clone of Supergirl, but she also the adult version of Supergirl (which explains the more enhanced features). Supergirl has a bright future! :)

Well, that makes Rule34 kind of redundant.

@ Larry:
No dude. That is only on JL Unlimited, the caroon show. She isSupergirl from another universe. “Earth-2” in DC lore.

Probably never comissioned by Dc. Comic artists are just as horny as the rets of us though and Benes probably just had the thought of PG and Supergirl going at it. Who hasn’t?

@ Larry:

Oh, I didn’t know that. So…. If they have sex, does that technically count as masturbation? Or is it incest? I can’t tell.

Power Girl is actually a clone of Super Girl

No clue – I found it at comic-images.com – there was no explanation as to where it came from..