Even as the iPad remains the favorite son of the magazine business, publishers are discovering that the Barnes & Noble Nook Color is a very promising younger daughter, the New York Times reports. The Nook Color has surprised publishers of women’s magazines like O, The Oprah Magazine, Cosmopolitan and Women’s Health by igniting strong sales that rival — and in some cases surpass — sales on the iPad. The success was not so easily predictable for a device that has been on the market only since November and faces stiff competition from Apple, Amazon and the Android-based tablets…