The red pixel was increased in size in the 2018 panels. This new 2019 or revised 2018 panel retains the large red sub-pixel but shrinks the size of the blue sub-pixel.The blue is smaller but the red is bigger. The French review is not the only one that showed the pixel structure so it definitely is in all the 803/903 sets ...
2017 LG OLED Panels - large Blue and White sub-pixels and smaller Green and Red sub-pixels.
2018 LG OLED Panels - LG increased the size of the Red sub-pixel - so that the panels had large Blue, White and Red sub-pixels and a smaller Green subpixel.
2019 LG OLED Panel?? - this new panel now has a smaller Blue pixel. So overall it has large White and Red sub-pixels and smaller Green and Blue subpixels.