I saw the 9C8F right next to a 9C90 (mine). The color on mine was ever so slightly more crisp and bright. I set both on the exact same brightness middle, 3/4, and full brightness. Mine was better, slightly.
I assumed it was because the 9C8F was in a rev B from April.
There is no way in the world anyone could tell the difference in a photo. The only thing slightly better on the 9C8F was the backlighting. I noticed only when the gray screen was on during the boot process.
I would take the 9C8F over the average rev C 9C90 display. But the really good 9C90 displays, ones without lines, are actually better in color and brightness. The other display from the rev B was by far the best model in my opinion. My rev B 1.86/SSD (stolen) was the most beautiful display I have ever seen. I so wish Apple would have used that one. I can imagine that the one from my rev B would probably look better in a photo even. Anyone remember what the model number was? 9C9A??? I think that was it.
Just worry about getting one that has no lines visible from normal viewing distance. It's very hard to find one without lines visible from very short distances (like 4 inches).