Google can be your friend -
“Robertson screws, also known as square-drive screws, are a Canadian invention that feature a square socket in the head and a matching square protrusion on the driver. The tapered square socket makes them self-centering, slip-resistant, and easier to drive with one hand. Robertson screws are used in many industries, including woodworking, HVAC, electrical, and residential construction. Here's a closer look at Robertson screws: “
They are the same.