A - Of course there is a difference between 1080p, i.e. Full HD, and 4K. As 4K screens have nearly four times the number of pixels in 1080p. And as the pixel density plays a major role in the formation of images. When there are more pixels, you get a clearer and more crisp image. Hence, theoretically 4K screens are better here. But for us viewers, this is not a very major difference. Although yes, you see 4K screens with clearer and crisper images, it all depends on the size and angle of screens.