The capacitive touch screen is not a real screen, but a component that is mounted above the LCD screen. The capacitive screen is a transparent toughened glass in appearance.
Furthermore, the two can not be compared horizontally, because they are not the same kind of parts. Most of the phones have these two screens at the same time.
Capacitive touch screen is a touch screen. It is transparent like glass, will not display any content or light. Its function is to perceive user's touch operation.

Capacitive touch screen (drawing)

The TFT screen is the real screen. TFT is the most widely used liquid crystal display screen material, mainly used in the middle and low end display field, the mobile phone is used more. The TFT LCD screen is a thin film transistor liquid crystal screen, it is a kind of display screen, without the function of perceiving touch, it can only be used to display the image.

TFT LCD screen (drawing)

At present, the mobile phone, usually at the same time using the two screen, two on the overlap, by the TFT LCD screen for image display, and capacitive touch screen is responsible for sensing user operation, this is the "inner" and "outer" origin. Shenzhen letter to the photoelectric professional capacitive touch screen manufacturers