I'll second that motion that VCD is worse than VHS. VCD is formatted at the very low fixed bitrate of 1.1 Mb/sec video + 224 kb/sec audio. Any rapid motion results in very noticable compression artifacts. It's only as good as VHS, if nothing is moving.
SVCD is about double that at about 2.5 Mb/sec total, but will play on very few DVD players.
DVD allows up to 9.8 Mb/sec total with variable bitrate capability, i.e. more bits can be allocated when there's lots of motion, which requires more bits to represent without noticable compression artifacts.