However, they differ on the basis of their design. For instance, the quadcopter has four motors to propel it and look almost like a helicopter while the military grade drones are jet fueled and look more or less the same as usual airplanes. So, unless you are in the military and are in need of a stealth drone, it would be best for you to go for a drone that has a simple design.
Camera and Gimbal Supports Drones are mostly being used for the purpose of photography and videography. If you want to use yours for the same purpose then you will have to find one that has a camera installed on it.