Radar Cross Sections cited (X-band):
F-22A Front Aspect = 0.0001 m2, Side and Rear Aspect = 0.01 – 0.001 m2 (0.005 used in this analysis);
F-35A Front Aspect = 0.001 m2, Side and Rear Aspect = 0.01 m2;
PAK-FA All Aspect = 0.01 m2;
Su-35-1 Front Aspect= 2 m2.
So we can conclude that F-22 better in stealthy parameter, but we must underline that the stealthy gap between Pak-fa and F-22 is become narowwer , and will lost the significantce in fews years become.
 Thermal Sensor Paremeter
Pak-Fa will be equipped with latest IRST that Russian has. In terms of thermal sensor Fak-fa has an advantages compared with the F-22. F-22 even now is not equipped with heat sensors. With their IRST latest technology, Pak -Fa can detect F-22 in the distance 70 km, even Pak-fa can detect Amram 120 firing in such of distance.
As like Pak-fa, i think F-22 designer will include IRST as upgrade package in tomorow years. And in term sensor and computation technology we must accept that US is the master.
 Radar parameter Radar Range Figures used are:
F-22A APG-77 = published figures (AW&ST - pessimistic);
F-35A APG-81 = published figures (AW&ST - pessimistic);
PAK-FA IRBIS-E N035 Best Case published figures (Tikhomirov NIIP);
Su-35-1 IRBIS-E N035 Worst Case published figures (Tikhomirov NIIP)
Irbis-E can detect and track up to 30 airborne targets at one time at ranges near 400 kilometers, and attack up to 12. In air-to-surface mode the Irbis-E provides mapping allowing to attack a surface target with precision-guided weapons while scanning the horizon searching for airborne threats that can be engaged using active radar homing missiles.
Tikhomirov NIIP has provided the ability to spot super-low observable targets with RCS equal to 0.01 square meters at ranges out to 90 kilometers.[Price Parameter]
Pak-fa price is about one-third of the price of F-22. F-22 almost imposible to lower its price.
In stealthy and radar parameter F-22 still better than PAk-fa, but this advantageous will fadded in tomorrow years. In optical parameter Pak-fa better than F-22, but as radar parameter, this advantageous also fadded away in tomorow years. In kinematic parameter F-22 and Pak-fa is comparable. And in price parameter, definitifly, F-22 cannot win this parameter , and price parameter become the most advantageus of pak-fa than F-22.