It is not at all noisy unless I rev it high, which I try to avoid doing most of the time. It is not loud like for instance a Yamaha T-Max, not helped by it attracting mostly complete retards.
Obviously there are always dumb people mounting akrapovic or other noisy aftermarket exhausts on any bike brand but it is also the same with cars.
The Piaggio Vespa is a scooter. The Piaggio Ciao is a moped.
Electric Vespa anyone?
I suspect that other brands of electric motorbike may be better