J-20 does not have worse stealth characteristics than the Su-57, its actually the opposite. The J-20 has a lower RCS than the Russian Su-57 and this has been proven scientifically in various tests and simulations. When we compare the radar contour of both Su-57 and J-20, we actually realise that the J-20 is more stealthy.
Introduction J-20 is the world’s third operational fifth-generation stealth fighter aircraft after the F-22 and F-35. It made China the second country in the world af…
basicsaboutaerodynamicsandavionics.wordpress.com
Introduction Su-57 is the first aircraft in Russian military service designed with stealth technology, it is intended to replace Su-27/30/35 family and server as the Russian answer to the American …
basicsaboutaerodynamicsandavionics.wordpress.com
Important thing to take into account here: In the above simulation of both the stealth fighters, there is
no RAM used, both the aircraft are considered as perfect electrical conductor which reflect radio waves like a metallic object so if RAM was taken into account then both aircraft would reflect very much less, but I think the people who did the above simulation didn't do so because they weren't aware of the effectiveness of RAM used on the J-20 and Su-57.
People shouldn't be underestimating the J-20, if the J-20 were indeed less stealthy than the Su-57 and barely a 4.5 generation fighter then the USAF wouldn't be using its F-35 as an aggressor to stimulate the J-20.
Battling China's J-20 stealth fighter, US Air Force has got its first fifth-gen aggressor pilot for 65th Aggressor Squadron at Nellis AFB.
www.eurasiantimes.com
First J-20 representing F-35 Aggressor Aircraft unveiled at Nellis AFB
theaviationgeekclub.com
Conclusion: I will say this, people on this forum, not the more well educated ones but the nationalists always tend to make BS claims about our adversaries, I am not saying that everything that the CCP is saying is true and the J-20 is a god level aircraft that can easily triumph other fifth generation Stealth fighters but I wouldn't want us to find it out the hard way. Nationalism is a curse.