F-35 vs Sukhoi T-50 (PAK-FA) - Which is Superior?

F-35 vs Sukhoi T-50 (PAK-FA).Two fighters that are stealth multi-role 5th generation type.F-35 Lightning II being much further along in its development is a single engine type packed with the most advanced avionics, sensors & weapons package ever devised & the Sukhoi T-50 a twin engine thrust vectoring / Supercruise type with extreme agility.both have their strengths & weakness.