Speed is a big disadvatage for F-35.It's top speed is on ly Mach 1.6(1728 km/h),while the Su-35 top speed is Mach 2.3(2400 km/h).The Su-35 has a maximum range is 4500 km,while F-35 maximum range has only 2222 km. Su-35 can carry more missles than F-35.F-35 can carry only 10 missles,but Su-35 can carry 12 missiles. The Su-35 overpowers of F-35 in speed,range,payload and radar.The F-35 has only has advantage over Su-35,that F-35 is stealth fighter aircraft.So Su-35 is a better fighter aircraft.