Component and RGB are different.
By some standards, RGB is a type of component video. The scheme popularized by DVD players in the US is less ambiguously called Colo(u)r Difference, Y/Pr/Pb, or Y/R-Y/B-Y. It's handy for compression, broadcast compatibility, and not much else (it has to be converted to RGB to display just like anything else, the conversion is just a very clean one).