It's not a matter of one being better than the other. It's just that there's multiple color encoding options to signal color information across 3 wires. RCA component and
D-Terminal only work with Y/Pb/Pr, and VGA and RGBV SCART only work with RGB. If you change the setting to the wrong one, you get no image on your screen, as the screen doesn't understand the color encoding it is ...