The two cannot be compared horizontally because they are not parts of the same kind. Most phones have both screens at the same time.
A capacitive touch screen is a touch screen that is transparent like glass and does not display anything or emit light. Its function is to sense the user's touch operation.
The TFT liquid crystal screen is a thin film transistor liquid crystal screen, which is a display screen, and has no function of sensing touch, and can only be used to display an image.
In the former mobile phone, these two kinds of screens are usually used at the same time, and the two are overlapped up and down, and the TFT LCD screen is responsible for displaying images, while the capacitive touch screen is responsible for sensing user operations, which is the reason for the so called“internal screen” and “external screen”.