Why is Powergirl only as strong as Supergirl?

Powergirl is age 27-28 and Supergirl is age 16-17. Powergirl has had her powers longer than Supergirl has and yet, they are only almost as strong as each others.

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  • 2 months ago
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    That's because she's from Earth 2.  Kryptonians from Earth 2 are not as powerful as their Earth 1 counterparts, and are subject to basic necessities like needing sleep, food, and water to live; whereas Earth 1 Kryptonians get their energy entirely from the sun and so they don't need any sleep or nutrients.

     

    On the plus side, Power Girl is immune to Kryptonite from Earth 1.

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