They may not have been in the same room, or even at the same event, but at their respectively glamorous NYC parties, both Crystal Renn and Hilary Rhoda opted for dresses by the same designer, friend Zac Posen. In fact, Hilary Rhoda not only wore his gown, but took Zac as her date to Harry Winston's dinner. Meanwhile, Crystal Renn, Zac's longtime friend and muse, opted for a brilliant fuchsia, bustier-style gown, offset with turquoise Lorraine Schwartz jewels for an evening out at the Angel Ball. Hilary kept it a tad more understated, choosing a sleek Fall-appropriate burgundy strapless and finishing with a side-swept bun. If you ask us, both supermodels did Zac Posen proud — but we're turning it over to you: who's the winner of this supermodel showdown?