Well there's only the windows and dos versions. The windows versions are mpeg1 quality and I've honestly gotta say that because of the quality of the actual film footage dl has to work with, it doesn't get much better than that anyway.
With that being said they do make dvd versions of these games, but obviously they don't support lightguns. The pc games are designed to be easily upgradable though, so in theory if you own both the pc and dvd versions, you can take the clips from the dvd version and dump them over-top of the pc version, thus giving you dvd quality with the pc engine. I can't confirm this though as I only have the pc version.