We will see that when the T-50 is taken to other countries. Insofar it has not flown outside Russia, so you should just shut up about it.
The Su-47 design was a huge fail. The Russians never solved the many many problems it had so they have to ditch it for a more primitive design like the T-50, so don't tell me that they solved all the problems and don't tell me that exposed engine vents like the T-50 has any advantage to it.
The J-20 has canards because the engine is not powerful enough and because 611 corp is experienced with canards. Once the WS-15 engine is mature I am sure the canards can be removed.
The thing is that at least we admit J-20 shortcomings. The Russian T-50 is nothing but a money scam.
Really ? a huge fail ? a forward swept wing supersonic heavy twin engine fighter with hypermaneuverability and supercruise??
wow.. didn't know that making a plane like that is a fail ...