When I got my Sega Saturn way back, it came with a video cable that is S-VIDEO in the Saturn end and SCART in the TV end (no adapter). It has always given me very crisp and nice picture on all the TVs I have used it on, better than the other consoles such as SNES/PS/N64, which all end with RCA (red/white/yellow) cables that go into a SCART adapter and then into the TV.
My understanding is that "S-VIDEO" is somewhere in between "composite" (RCA or white/red/yellow) and "component" (RGB) cables in terms of signal quality.
However, modern TVs no longer even have one single SCART connector, so I could not even connect my Saturn to the current TV to compare it with the following.
So I recently bought a different video cable for my Saturn, which (of course) has the same S-VIDEO connector in the Saturn end (it's the only way the Saturn outputs video), but instead of SCART in the TV end, it has just the plain old RCA cables (yellow, white, red), just like my other consoles. Which can either be plugged directly into the TV or into a SCART adapter which is then plugged into the TV.
So that must mean that the new cable has a composite video signal, right? In other words, more "bleedy" than the "pure" S-VIDEO signal with the old cable, which is "S-VIDEO" all the way?
I wish I had a way to test this, take photos and compare myself to be sure, but the next best thing is to ask here. I'm 99% sure I've got it right, but who knows? Maybe I just imagined the "crisp picture" that the Saturn always seemed to produce with the old cable, and maybe it's just converted to a plain old "RCA" signal inside of it?