What's the difference between radio control cars,remote control cars and RC Cars?

A rc car is a radio controlled car, and a radio controlled car is a type remote controlled car, it could use a wired remote instead.
References :

Radio-controlled cars use a common set of components for their control and operation. All cars require a transmitter, which has the joysticks for control, or in pistol grip form, a trigger for throttle and a wheel for turning, and a receiver which sits inside the car. Remote cars are also working same as the radio controlled cars.
References :
http://www.rcplanechat.com/RCCars.html