Russia's Su-35SM has been upgraded and equipped with Su-57 Capabilities to give the fighter an edge over 4++ generation fighters to give an edge against the F-22 and F-35 until the Felon is massed produced.
Russian aerospace CEO says the naval variant Su-57 Felon is possible but will have to be built alongside a new aircraft carrier to avoid problems later.
The Sukhoi Su-57 Felon is a 5th generation fighter that is yet to be tested against the F-35 or F-22, with its stealth capabilities which is a premium for modern fighter.