It seems to be "common knowledge" around the web that the RBG output of the Saturn was not as sharp as other Sega consoles - or so I had been told on several occasions. As a result (it's claimed), using the HD Retrovision adapter with the Saturn would end up being somewhat underwhelming. What I found was that the HD Retrovision solution offers a huge improvement over RCA composite - even if it's not quite the leap that the Genesis gets.
Have a look:
I've since had several others report that they felt the "web consensus" on this was a bit of nonsense as well. What are some other "common knowledge" claims floating around the gaming-web that you think are a load of rubbish?
Retro Tech Select - My Youtube channel. Covers throwback consumer electronics with a focus on "vid'ya games."