I have a modded Saturn so I can play put games on CD-Rs and play them on the Saturn.

I was just curious, are the roms/rips (on this website for example) just as accurate as the original copy?

I know for Dreamcast they probably won't be 100% accurate since you are compressing things from a GD-R (1GB) to a CD-R (700MB). But I was thinking that the Saturn would be since CD-Rs have more than enough space for a Saturn game.