Much of the F-35’s superiority over the Russian Su-57 may reside in its mission systems, long-range, high-resolution sensors and targeting, computing, weapons range and guidance systems.
There are a few reasons to think that the Russian Su-57 could be a little behind the U.S. F-35, F-22 and whatever innovations might be being built into the emerging 6th-generation aircraft
Why? There are several key areas which jump out for consideration, relating to stealth configuration, hypersonics and manned-unmanned teaming.
Well obviously many details about the Su-57 are not likely to be available, perhaps apart from what gets mentioned in the Russian press.
However, a few recent articles in Russian-backed newspapers indicate the country may be behind the U.S. when it comes to manned-unmanned teaming or a “loyal wingman” capability when it comes to the F-35.