Maybe it's the lighting, but your 8x2 and 816h looks very similar in color, so does 823u and 811p.
The pics were taken under roof spotlights, maybe the lighting was too bright as the fading on the jeans became more pronounced.
Still, I find the 823U very similar to 811P. The fabric has the same stiffness to it, the color is almost the same, but 823U is lighter and has some distressing. My 811P is 30X30, so is my 823U.