How do you tell what panel you got with the Samsung 22' LCD's S, C or A?

[1ManArmY]

I am moving from an 19" NEC FE 950 CRT, little late getting in the LCD game and I have been looking at the various Samsung LCD's ranging from the 216BW 5ms 1000:1 compared to the 226BW 2ms 3000:1. How do you tell if you got a S, A or C panel? Does this panel lottery only pertain to the 20 an 22' models?

Your suggestion's please.