I tried asking WikiAnswers but no answers. So I wanted to ask here.
The person meant the look of the two cords.
What do you think? Data cables are used to power up the device, and the power cable is used to transfer data.
Power cable supply power to the device, so its charging speed is greater than while charging it with data cable
Answer is basically within the question itself. Data cables provide a pathway for information to go to and from devices in a computer. Power cables supply the devices with power so the internal components can move that information from device to device.