Ok. Its all comparable, isn't it? Losing 30% or even 70% of population is definetely better than losing 100% of population.I have years in SAC and are more versed that there are no winners, only losers, in a Nuclear exchange. It's not winning, it's whom loses the least and who loses the most. When the Us will lose almost a 1/4 of it's population in the first few minutes of a Nuclear exchange, that's not winning losing about 90 million people in minutes. Then there is the aftermath which the total population will end up being about 85%. Sounds like the USA would be the big loser. Nope, not even close. Our population is scattered throughout our entire nation. Russia and China has a more condensed population in the more habitable regions. Their losses will end up being closer to 95% in the first year. No one wins.
And no, the difference between survival of 90% population and survival of 10% of population mostly depends on:
1) how good is your first counter-force strike;
2) how good is your ABD in interception of incoming retaliation warheads;
3) how good were your evacuation and sheltering before the strike;
4) how much material resources do you have in national reserves;
5) how good is your patching-up and recuperation after the strike;
6) how good is rebuilding of economy and the new post-war world order (including taking resources from your neighbours).
There are plenty of difference between Russia and the USA, but first of all, you must ask yourself and answer - what is the acceptable price of victory (in Ukraine) for the USA? If acceptable price is lesser than 1 mln of Americans (and I believe so - more or less equal to acceptable price for Russia for return of Alaska) - you shouldn't have even start the game that you can't finish.