Dual Airspeed Sensor

Hello everyone. My curiosity is if there is any benefit to using dual airspeed sensor. If yes, what? I mean, thanks to GPS blending, EKF can make much better predictions. Is this also valid for airspeed sensors? If there is such a thing, what are the things to be considered in use? I made some research about it but I couldn’t find any useful information. Thank you very much in advance for your answers.