Su-57 is more like F-22 than F-35. F-35 works best alongside something like F-22, but F-22 is banned from export.
F-35 vs Su-35s in dogfight = only one winner. F-35 is slow, low range, not manoeuvrable.
"In 2008, two analysts at the RAND Corporation, a California think-tank that works closely with the military, programmed a computer simulation to test out the F-35’s fighting ability in a hypothetical air war with China. The results were startling.
New videos leaked from the US Air Force's F-35 demo or stunt flying team show the jet making head-spinning turns that older jets could never hit.
3) Rand study being quoted by you is more than 10yrs old. Forget the F35, even the F16 Blk60 has gotten upgrades in the last decade +.
Nonetheless, the F35 Blk3F flying today has undergone many upgrades in the last one decade.