The SP11s graininess is very noticeable, across the entire screen, any brightness and any color. Solid white doesn’t look “solid”. I think it’s a combination of two things: the digitizer matrix is very visible, and OLED not having a traditional sub pixel arrangement (think pen tile and similar) so text can be “less crisp” than an LCD at the same resolution, and this is usually less noticeable the higher the DPI. The windows logo (start menu) looked blurry in every unit I saw.