The same Chinese language insider post from Yankee that described the AI/duel-mode being neat was also the same post that wrote the J-16 as being superior to Su-35 in terms of the primary radar and in terms of ESM and ECM.
As for the radar, I acknowledged as much in my original post, didn't I? But the thing is that you have to take a more holistic view, perhaps focusing too much on individual systems rather than their performance in concert is why "Duel" is seen as so novel?
His rating the (RF) ESM/ECM on the Su-35 as inferior is the one thing that stands out, but could be explained by downgrading for export in keeping with past practice. So in that regard his statements may be true but at the same time have no bearing on Russian-operated Su-35, as Bronk argues.
Regarding the use of composites, I don't think that was often attributed to primer colour -- rather it was part of the consistent set of rumours going back over a decade. If the rumour is true, it is likely about a decade out of date.
I'm less concerned with whether the rumour still applies if you factor in the Su-35 than if it was ever true in the first place. Even the Su-35 falls well short of the scope of changes required to reduce OEW below the original Su-27, in fact with all the new equipment, higher payload/MTOW and longer service life it is somewhat heavier.
As I said, the rumour has never been substantiated to my knowledge and over the years a considerable body of circumstantial evidence has accumulated which argues against it.