I did not know any of this when I purchased the panel. In fact Villman didn't even let me look at it: sealed box and all. So I carried the box home "blind."
Thankfully (or perhaps not.. ignorance is bliss) there is a way to determine what sort of panel I have got, via a hidden service menu.
- set Brightness and Contrast to zero
- exit the OSD
- enter the OSD again by pressing the Menu key
- press the Source (VGA/DVI) button for >5 seconds
I don't know what I'd have done if I actually had an A- or C-panel, because the truth is, this screen is gorgeous. But maybe it's gorgeous because it's an S-panel..