What counts and what is relevant are operational numbers in frontline units, not any certain details like a special grey, more a grey-grey than the one other air forces use - or any other detail.
And since you mention it: Is it a sign of being so much of a "very smart and
forward-looking platform" since there is "Izd. 117, 177, 30"? and in fact, so far where is the long-promised Izd. 30 in service, and the flat nozzle is a test-bed, nothing more!? Not yet and as it seems there are again claims after claim and promise after promise but still nothing in real live even against what official "sources" claim!
As such, come back when the second frontline unit is ready and you have operational experience in numbers for years, then we can talk about being a "very smart and
forward-looking platform" ... but in the meantime while Russia tries to finished what they promised for ages, other nations are progressing even more forward, and you portray about a dozen or 20 operational basic Su-57 as the best of the best!
That's pathetic - and in fact comparable to claims by some Indians, the Tejas would be the best 4+th generation fighter around, nothing more. I slowly think we should indeed start a separate section within this forum as a "Kindergarten or Krabbelgruppe" where new members can earn their credibility by posting stuff before being promoted to discuss with the big ones! And as long as they only post random fan-boy stuff and overhyped expectations as relevant facts, they should remain there!
@overscan (PaulMM)