This is not actually a typical VS thread because both these fighters are operated by friendly countries. So the probability of these 2 fighting against each other is Zero. This is just to see how these 2 compares with each other and also, gives an idea of what the Super-Sukhoi-30MKI might derive out of the Su-35S platform. Su-35S(formerly Su-35BM) is the most recent and the most advanced of the Su-27 family. It has a all-metal structure, but unlike other Su-27 family fighters, it's comprised of titanium composites. As a result its airframe life is higher than the others. Its avionics is one of the best, and its radar is the best in the world in range. How does it compare with its cousin the successful Su-30MKI family comprising of Su-30MKI, Su-30MKM and Su-30MKA? Below are the similarities between Su-30MKI and Su-35S: 12 Hard Points 8000kgs external ordinance G-limit 9 Same Air-Air and Air-Ground weapons package Has Thrust Vectoring Can house external jammers and all varieties of pods. Has inflight re-fueling etc.. etc.. Differences: Su-30MKI- Maximum internal fuel - 9,640kgs Max Range(without mid-air refueling) - 3000kms Max ceiling - 17.3km Max Speed - Mach 1.9 Canards - Yes Crew - 2 Max Afterburner Thrust - 12500kgf, Emergency Thrust - 12800kgf External Fuel Tanks - No Composites - Not in significant quantity. Empty Weight - unknown. Estimated to be around 18400kgs. Airframe life - 3,000hrs or 15 years(at 200 hours flight time each year) Internal Jammer - No RCS - unofficial estimate 11.5m2 Airbrake - Yes Supercruise- No Su-35S- Maximum internal fuel - 11,500kgs Max Range(without mid-air refueling, without external fuel tanks) - 3600kms Max ceiling - 18km Max Speed - Mach 2.25 Canards - No (since radar isn't heavy) Crew - 1 Max Afterburner Thrust - 14500kgf(gives a massive boost to TWR compared to Su-30MKI) External Fuel Tanks - Yes (can carry 2 drop tanks of 1400kgs fuel in each of them) Composites - Yes. Extensive use of Titanium Alloys. Empty Weight - Unknown. Estimated to be around 18800kgs. Airframe life - 6,000hrs or 30 years(at 200 hours flight time each year) Internal Jammer - Yes RCS - unofficial estimate between 1-3m2 Airbrake - No. Powerful modified rudders act as Airbrakes. Supercruise - Yes Radar- This deserves a separate mention. Because this is where the difference is at its max. Su-30MKI has a N-011M BARS Radar Transmitter peak power - 5kw Transmitter average power - 1.2kw Can Track- 15 Targets Can Simultaneously Engage - 4 Targets Max Detection for 5 sqm RCS - 140 km(Upgraded Radar with upgraded transmitter power, if any in service, its range is unknown.) Su-35S has N-035 IRBIS-E. The most powerful Fighter Plane mounted X Band radar in the world. Specs are as follows. Transmitter peak power - 20kw Transmitter average power - 5kw Can Track - 30 Targets Can Simultaneously Engage - 8 Targets Max Detection for 5 sqm RCS - 426 km Max Detection for 3 sqm RCS - 375 km Max Detection for 1 sqm RCS - 285 km Max Detection for 0.01 sqm RCS - 90 km DATA FROM OFFICIAL SUKHOI and NIIP WEBSITES. Not Wikipedia!