The Hero Duet returns a mileage of 63.8 kmpl whereas the Honda Activa returns 52 kmpl. Both the scooters are equipped with similar engines, and are quite alike in terms of performance. Both the scooters are good looking, and offer stiff competition to each other. But the Honda Activa outsells the Duet by a huge margin. Detailed specifications of both the scooters will help you make an informed choice: