What are the advantages and disadvantages of helicopters and quadcopters?

Helicopter: the action is more flexible, you can do more tricks, the operation is difficult, the price is differentiated between the same helicopter can be equipped with a few thousand dollars can also be equipped with a W. Carve the choice to match with the accompanying electronic equipment

Quadcopter: easy to get started on the operation of the maintenance of the production is simple, need to match with a few more electronic equipment.

The high-tech content of the upstairs is not very correct, the helicopter can be equipped with self-stabilization, GPS and other messy things

The helicopter can be equipped with self-stabilization, GPS and other messy things.