According to Philips brochure only 170B7, 170P7 and 190B7 have the "perfect panel" warranty.
The 16,7M colors spec is no more indicative.
The Samsung 970P (LTM190E4) is declared 16,7M colors and it use funny old dithering method.
I seen it with my eyes.
The AUO panel in the 190P7 probably use temporal dithering.
You can found some evidences about it on the web.
This is not a bad thing and it's fully understandable, because there are panels for office/generic use.