The domestic 5th-generation fighter Su-57 completely surpasses the American F-35. This opinion is held by Federation Council Senator Vladimir Dzhabarov.
He reacted to Turkey's plans to transfer S-400 "Triumf" anti-aircraft missile systems to a third country in exchange for F-35s from the USA.
I don't see any particular risks for Russia, because F-35s are aircraft that don't scare us, our Su-57s surpass F-35s.
The foreign publication 19FortyFive noted that the F-35 with a radar cross-section of 0.001 m allegedly surpasses the Su-57 by 1000 times in stealth. By the way, the RCS of the Russian fighter was estimated from 0.1 to 1 m².
The Su-57 also began to be equipped with a universal reconnaissance and targeting external pod 101KS-N.
Earlier, "Pervyy Tekhnicheskiy" in a large article explained why the Su-57 has two engines, and the F-35 has only one.