Comparison Shop Marni Uptown vs. Derek Lam Downtown

This week, back-to-back store openings vie for the attention -- and dollars -- of Manhattan's fashionistas. In one corner, Consuelo Castiglioni's Sybarite-designed Upper East Side boutique. In the other corner, Derek Lam's sleek SAANA-designed SoHo headquarters. Bee-Shyuan Chang caught up with both of the designers, who talked about their new digs.