First of all, FRC does not add more bits. It's still an 8 bit panel. That means every subpixel can be between 0 and 255 in brightness (as an integer). FRC means that if you want to display something between 7 and 8, for example (ie, something more precise than 8 bit will allow), you would flash between 7 and 8 with every refresh, thus simulating an average of 7.5. This is better than 8 bit at reducing banding, but you may notice this flickering which (subjectively) might be worse, so which is actually superior depends. A true 10 bit display would simply display 7.5 directly, since it could go from 0 to 1024, or in another way of thinking, 0 to 255 but in increments of 0.25 instead of 1.