But it is not fair to compare Su-37 vs. F-22. Is the same thing like comparing Su-27 family vs F-4.

Right, its agility will suffer. But it can do a cobra maneuver and will not tear its wings link western media said, that I read in the past.

The Mig-31 had the most advanced radar in the world from its introduction in service in 1975 to 2005 when the F-22A's AESA radar took the cake. The Mig-31's radar is STILL the longest range radar but cannot handle as many simultaneous tasks and doesn't have as low a probability of intercept. The USA did not even come close to comparison with the Phased Array radar of the Mig-31 until it equipped F-22's with AESA radars.

Modern Su's use Phased Array radars comparative in range to AESA radars . but of course comparative in technology to the Mig-31's radar. This includes the Su-27M, Su-35, Su-37 and Su-30MK series among others. These radars are far more advanced then anything else fielded in the USA asides from the F-22 radar. They can track and fire at multiple targets, have a low probability of intercept and have a passive mode which allows them to detect aircraft without even emitting a search beam.

This is a large part of their natural advantage in BVR combat. Their radar means they are likely to detect the opponent first and get the jump on them (when applied to an aircraft like the F-15). The F-15 will likely only be aware of missiles homing at the final stages of their attack (last 10km).

Onto missiles, the other major factor in BVR combat. The R-77, R-77m and R-77pv are at least equal in performance to the US AMRAAM-C. The M and PV variants outrange the AMRAAM-C and all 3 variants are more maneouverable, while possibly suffering a higher drag penalty when turning. So in effect Russia is equal or ahead of the USA in missile technology. This is of course ignoring US missiles that are not in service.

As for WVR combat . the Su-27's gun was not designed to be its principle weapon in a dogfight. The R-73 missile on its inception was 20 years ahead of any dogfighting missile the West had produced. Its abilities are as follows:
-it is aimed using a helmet mounted sight
-it can be fired at any target up to 60 degrees in front and behind the aircraft
-it is considered impossible to evade
This is the reason why the Russians were happy to design aircraft that could sacrifice massive amounts of inertia for an angle of attack. In modern WVR combat those who get the first shot off win 99% of the time. Therefore, while a US aircraft prior to the F-22A has to get behind its opponent to get a lock the Su-27 and Mig-29 series can fire at anything they can look at. Using their maneouvreability they can turn much more rapidly then their opponents and even fire at a chasing opponent before the tail gets a lock.

As for a comparison between the F-22A and the F-15 . most of the reason for the sheer cost of the F-22A, asides from the bloated US arms industry is the amount of catching up they had to do. Additionally they could not justify an Su-27 competitor so they essentially had to build a better aircraft. The way they achieve this is through only 3 factors:
-low observable technology
-AESA radar
-Super Cruise

On all other aspects they come close to the Su-27 series or equal it. In WVR the Su-27 series can still fire first in the majority of circumstances but BVR is much more likely. In this instance the Su-27 series can only 'return fire' in most instances as the F-22A should theoretically be able to remain hidden until it chooses to fire. That said, there is every chance the Russian radar is capable enough to detect the presence of an AESA and even the location of it. That is essentially a guessing game that even the Russians and US are playing.

So yeah . the F-22A is great but a highly upgraded Su-27 series aircraft is 2nd best in the world and therefore not that far behind. In a pure one on one engagement with no external support for either side the F-22A would probably come out on top 80% of the time. However, unlike with the F-15 which lost dismally 8-1 a 2-1 engagement would mean a 40% chance of a win for the F-22A, a dramatic reduction from the one on one engagement.

So process all this information and then think about the economic factors involved. A late model Su-30MKI, the best Su-27 series aircraft in service today, costs $35 million and an F-22A is now costing over $400 million after yet another price inflation. China, which is buying an aircraft similar to the Su-30MKI (Su-30MKK) has a large defence acquisitions budget and is essentially getting a capability that will work against the USA's last Air Force gamble.

wht abt su-33? su-30mk/mkk?
what abt su-34 (striker) : it was exciting to know that is has some space for pilots fo have food and gym.else fighters are so cramped.

one more thing, no doubt russian fighters are in par with the west, but russians cockpit is nt so much comfortable as the west.