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Team Olsen combined powers yesterday for the New York launch of their style book Influence (you can hear them talk about the book with Oprah here). Mary-Kate (in black) and Ashley (in red)... (well, I think that's how it is anyway... just when I thought I had figured out who was who, they go and match their hair up to make things really tricky!) looked fittingly style-worthy in their respective get-ups.

But who had the edge? Vote below to let us know who you thought was the more stylerific Olsen.

[Image: Sipa Press/Rex Features]