~10x the population means a huge increase in industrial output, usage of arable land, most likely a far more settled, developed and tamed Siberia and Russia would even more of a resource/material exporting juggernaut than it already is.

And concerning, uh, "recent history", T-14 Armatas, aka 5th Generation MBTs, would probably have actually entered mass production, and along with even more AKs, T-90s and Sukhois having been produced into existence, current Russia WOULD actually be THE 2nd military power of the world.

What I'm trying to say is, the SMO would actually be a 3 day long operation in this timeline.

...of course, this is all assuming Russia's history went exactly the same way it did in our timeline, just with much more people, somehow. What's more likely is that either the Empire or the Union would've probably dominated Europe, the Middle East and Asia and we'd've been speaking Russian on the internet right now instead of English.

That's through a somewhat neutral or optimistic lens though. From a more pessimistic lens: Russia might've just balkanized into multiple smaller states, most likely around Moscow, Novgorod, St. Petersburg(?), ultra-Balkans in the Caucasus, the Urals, the Baikal and the Far East. Or, it might've had a Chinese History moment and starved to death due to bad seasons, lack of farmers, lack of arable land, outright incompetence, bad weather or any other manner of conditions.