Honestly speaking every single plane that isn't VLO is outdated. Yeah tech wise Russian Flankers trail Chinese ones in AESA radar and QWIP IRST. But just having AESA radar and better IRST doesn't automatically guarantee a victory.The flankers are a dated design. Atleast the Russian ones. What the Chinese did with the j-16 is what we really need. A high composite aircraft with al-41f1, maws, jamming wing pods and aesa radar with stealth shopping on it's vents. The su-35 might pose a threat to american aircrafts but not too more modern eurocanards.
Russia isn't going to attack Europe or USA. Their current air power backed by their super advance IADS is good enough to keep them safe in a conventional war against the Euro-Canards.
Speaking of which, in exercise Indradhanush 2015 our Flankers whooped Typhoon 12:0 in dogfights and also scored better than Eurofighter in BVR.
Both SU35S and SU30SM are more advance than our MKI. They can hold their own against any modern fighter in the right hands(in my opinion).