A steadicam operator has the same sole responsibility as a camera operator. However they are qualified to use a steadicam to achieve the shot. A steadicam is a stabilization system, to capture smooth and steady shots while moving. The Steadicam consists of a camera mount, arm, and vest
A camera operator works closely with the cinematographer to ensure that their vision is crossly represented. The operator frames and designs shots to help the cinematographer and director achieve how they want to shoot a scene.
An operator will decide what tools to use that they think will best help get the shot. Including lens sizes and movements of the camera with a dolly or crane.