Some arguments are a farse,
1. Russians created the basis for stealth 20 years before the US, but the proposal was trashed by the Union, and it was a Russian physicist (Petr Ufimtsev) who was responsible for advancing the US stealth program.
This aside the next generations of aircraft such as the PAK-FA employ stealth technology, current prototypes and to some extent the SU-35 have stealth aspects added. The problem seams to be a lack of recognition in Russian political circles of its usefulness.
2. The IbrisE and other next generation PESA arrays allow Russian fighter aircraft to engage cruise missiles and unmanned aerial vehicles as well as fifth-generation stealth fighter aircraft, such as the F-22 and F-35 at 80-90km. With a range of 400 miles on normal targets, and capacity to track 30 airborne targets while engaging 12, their cited performance figures exceed those for the APG-77 used in next gen US aircraft such as the F22.
3. Is there really a competition in air-to-air missiles? everyone knows that the soviet union won the missile race, this technology finds it's way to Russian air-to-air and air-to-ground missiles, which not only have better maneuverability than western counterparts, but greater speed and range. Even the aged russian AA-10 (R27-ER) has twice the range of the US AMRAM system, the R-37M has a range almost 5 times the AMRAM, and a more sophisticated targeting system. R-77 is on par with the proposed Meteor system, and both use an air breathing engine, except the R-77 has a higher service ceiling.
This misconception that the Russian aerospace sector is some stone age workshop is nonsense, it lagged behind in the 90's during the perestroyka, but with added investment it is back where it should be.