What gives better picture RCA or cable?

An RCA cable with composite video is better than standard definition cable. An RCA cable set (3 cables) can also carry a component video signal, which can be Hugh definition up to 1080p. Cable television can also carry a high definition signal if you have a HD cable box or a TV with a digital tuner. For connecting a VCR, an RCA composite video cable will give a better picture than the RF antenna cable.