Kurotsuchi FTW or "Draw." Why?
Their strength and battle experiences are somewhat equal, but Kurotsuchi is more versatile in battle thanks to her three chakra natures and unknown Kekkei Genkai Ability, giving her the advantage in battle. Although, Anko, student of Orochimaru, has much experience and skill from Orochimaru's adaption of snakes, making for a formidable opponent because of the utilization of snakes through defense and attack, can not withstand heavy attacks from Kurotsuchi's Youton Techniques.
One, or both of them, winning with much difficulty or not still makes for an interesting battle. The battle can go either-way, such as, Anko killing Kurotsuchi with a snake bit and/or Kurosuchi killing Anko with her Doton, Katon, Suiton or Youton Techniques.