In addition to my original post, in my opinion about wars and WWIII if it were to happen: there's no real importance to give about what country has more soldiers. Wars today (and in the late and future centuries) are won through either financial sanctions, digital intelligence / resources and power of weapons.
I would even go to the extent of saying that
not even battlefield strategies are really important, as Blitzkrieg was on WWII for instance.
Therefore, no matter whether China or Russia have 100,000,000 soldiers, hell not even NATO matters, but the United States of America, that spends trillions in military due to which they must hold unthinkably powerful weapons already; a lot of information about any country worldwide, computational resources to control every single thing. They should be able to ultimately destroy the entire world if they wanted to do so.
In conclusion, if I have to bet on a winner, it will always be westerner. It will always be the United States. There's no comparison to any other country in the world: they hold an unbelievable amount of resources and information about EVERYTHING.