Russia is an old heavy weight boxer with heavy punch and much experience that could last to round 12.
who doesn't punch a lot but hard
China is just a young boxer punch a lot but weak, we can't make sure he could last for long just based on his claim in press conference.
Did you see Russian buy any weapons from China?
In China turn :
1. Aircraft carrier : buy Russian old carrier
2. Submarine : get design and assistance for their 1st sub from Russia ; buy Kilo class from Russia ; next Amur class
3. Destroyer : Sovremeny class
4. Aircraft and engine : Su-27, Su-30, engines, next Su-35 ; actually their J11 - J16 all based on Russian designs.
5. Air defence S300s ; and next S400... from Russia
6. Tank:
... you name more
China must still work very hard to catchup with Russian R&D.
hard to compare China to Russia
Russia has a better air force and better army
but when it comes to navy China is ahead of Russia , building ships faster than anyone else
not sure if you could say equal but that is just my opinion
as for the fighters both Chinese and Japanese side
released very little information about both fighters
so can't really say which one is better and which one is worse
For US, Japan and allies : their connection has more strength than Russia and China.
For example : Aegis is not the ship but the combat system which link all of Aegis-ready warships to detect and launch missiles to any target of all ( Japanese, Korean, US, Spanish, .. )
China has none type of that link to Russia or any other countries, even among Chinese ships.
Turkey must reject the SAM deal with China because of requirements of common defense system which link all NATO countries.