Dreamcast-Talk.com

Seeing that your TV has RGB/SCART and your Dreamcast works with this cable, it's best to stick with the RGB-cable. However for some reason Capcom decided to block RGB/SCART cables for a couple of their releases, Vampire Chronicle's is one of them. So with those games you can use a CD-R copy with the RGB-protection disabled. This way you'll get the best quality out of your TV (composit and s-video are sub-par!)

Vampire Chronicle most definitely supports VGA. Ran casuals sessions on VGA and Svideo before without any issues. Tho keep in mind, I reside in the US.