Dylan Lauren, daughter of Ralph Lauren and owner of Dylan’s Candy Bar on Third Avenue, is “furious” with competitor Sugar Factory for wooing away her employees — and has been sneaking around taking photos of her rival. Las Vegas-based Sugar Factory has made a splash with its Couture Pop, a bejeweled lollipop enjoyed by a series of celebrities including Rihanna, Katy Perry and Eva Longoria. A source tells Page Six, “Dylan was livid when her brilliant store manager, Abel Horner, left to go open Sugar Factory’s Vegas store.” Lauren was spotted last week in Vegas at Sugar Factory in the Mirage Hotel. A spy says she was intently looking around the store and “whispering with another woman.” The candy queen was said to be in Vegas scouting a location for a potential outpost there. Lauren couldn’t be reached. A Sugar Factory rep said, “We are flattered Dylan’s looking to us for inspiration.”