I am a user of Maestro. I have been using since a month. I have done with the 1st service and expecting for the better mileage. Before the service I was getting 40KMPL. The pick up, mileage and comfort are awesome. I did test drive the Activa and Maestro but I found Maestro has great comfort and smooth while riding and less weight. The top speed I reached is 80. The interesting part I like is the digital technology. It is easy for me to find the mileage for a liter for every trip.
I would say, go for Maestro.