If all goes well, we'll be able to compare their freshman and senior years. As for the other two years, we'll need some mysticism to come up with a conclusion. But here's my mystical reading of them:
Sophomore year, Paige carried her team to the NC game, so I think she wins that one. No one is under the illusion the Huskies would have made it that far without her. Junior year, Caitlin wins because Paige didn't play, and she carried her team to the NC game. Some might call those two years a wash.
Of course, I disagree about the role of statistics in such questions. I'm like Mark Twain that way. Success is what counts. If healthy Paige leads the Huskies to a dominating NC winning season, she wins regardless of the statistics. I also hope Caitlin has a tremendous season, and I'd be tickled to see her face off with Paige in the NC game. Wouldn't that be something special! Two great magicians of the court working their magic on D1 basketball!