Not sure if up to date anymore, but if you look at some samples like here, at equivalent adjusted income levels, people across the world have similar standards of living regardless of where they live.
What is equivalent adjusted income level? PPP between Russia and USA is around 1.8. Median annual salary in the US is $57 ($1196 per week), median salary in Russia is $13200. Even if you adjust it, it's roughly two times smaller.
As someone who lived in a bunch of countries, some rich and some poor, no, living standards among the avg. Joes of the world are not even remotely the same.