It isn't a resolution difference. HDR when added to 4K gives a much more range and accuracy to colors and contrast the two most important aspects of how a picture looks on a TV. There are scant few actual sources that as yet use HDR, worse there are two or three different brands (kinds) and all are not compatible with every TV. Netflix has had some HDR encoded shows but till very recently none were compatible with Samsung TV's. Amazon has a few of it's shows with HDR.I can't find any data on it, does anyone know the streaming bandwidth difference between 4k and 4k with HDR?