@Yellow Saddle, I just counted the dots on your graph1 and I realised I misunderstood the graph. I initially read the scale 1 to 16 and I thought the graph showed only the DS spokes.... I apologise for ny mistake.
I'm glad I notice the error cause I was beginning to think not even a factory built wheel would be so poor
With that in mind, 400N difference would be expected so I take "lazy wheelbuilding" back.