My opinion is that if we're going to compare capitalist vs. socialist states, then at least one should make a more complete comparison than simply comparing America to the USSR.
List of socialist states - Wikipedia
According to Wikipedia, these states are considered socialist:
China
Cuba
Laos
Vietnam
Algeria
Portugal
Bangladesh
Eritrea
Guinea-Bissau
Guyana
North Korea
India
Nepal
Nicaragua
Western Sahara
Sri Lanka
Tanzania
I'm not sure about Portugal or India, as I wouldn't have expected them to be on the list.
However, that would mean that all remaining states must, by default, be considered capitalist.
Now, we can look at the 25 poorest countries in the world, and find that only two socialist countries (listed above) are on that list:
View attachment 55851
Mapped: The 25 Poorest Countries in the World | Business Insider Africa
The bottom 10 poorest countries on the planet are ALL capitalist countries, and it's pretty clear that they are far worse off than socialist countries such as Cuba or North Korea.
It's also interesting that 20 years of US occupation didn't help Afghanistan get out of the bottom 10.
All in all, I would say this presents a more balanced picture, rather than the patriotic chest-thumping Americans who crow "Ha ha! We have it better than North Korea!"