Apparently Britain's most famous sibling is in the same, cheerleader spirit as the Blue Jasmine star. Her pom-pom skirt by Matthew Williamson is a bit less "rah-rah" than Cate's Prabal Gurung look, but that's probably just because we can't think of a school with blue and peach as their mascot colors.
Outside of color, the first difference we notice in these dresses are the drop waists. The Aussie actress has more of a natural middle thanks to the black-and-red bands, while the U.K. beauty looks slouchier on account of the roomy center. The fashion factor has us swaying toward Cate's side, but the smaller size of Pippa's wild skirt is far easier on the eye.
We're going to have to call this one a draw, which just means the decision is on you! What's your say?