I own a Canon Rebel T3i and on the accessories page on Canon website there is a Remote Switch (Cable Switch) and Remote Control. What is the difference between both (they are the same price) and if I got one do I really need the other one?
The remote switch (RS-60E3) is a wired shutter release switch that allows for the activation of the shutter via a cabled interface. Your location is limited by the length of the cable.
The remote control (RC-6) is an infra-red shutter release device that allows the shutter to be activated using an infrared signal. Because the RC-6 uses infra-red to communicate with the camera and the sensor is on the front of the camera, this means the remote must be in front of the camera to trigger it, with a direct line-of-sight to the receiving sensor. It is possible to reach over the camera and trigger it whilst standing behind it. The RC-6 also offers a 2 second timer.
They perform the same function with the difference being wired vs. infra-red.