Aircrafts things..., stealth Options

[TheViking92]

Why the Russian PAK-FA (su-57) has furtive ability and
the Americans F-22 and the F-35 do not?

Why are the F-22 invisible when I put this stealth skill on them?

   Behavior = StealthUpdate ModuleTag_09
     StealthDelay = 2000; msec
     StealthForbiddenConditions = TAKING_DAMAGE; ATTACKING
     FriendlyOpacityMin = 50.0%
     FriendlyOpacityMax = 50.0%
     InnateStealth = Yes
     OrderIdleEnemiesToAttackMeUponReveal = Yes
   End

[Bluna]

I may also add that most of the units got their own names like the once known Msta (now Gorgon) or the bmp (now Mauler) or even totally new tweaks like the Hellion.
For my knowledge the KA 50 got replaced by their own idea of the Ka 68. Just so that those units fit better in their universe.
So as for what I understand and also like the SWR team preferce looks over realism but the later is still important for them.
Just a perfect mixture like the old c&c games of the Westwoodera.