Your reasons given elsewhere don't make much sense to me. You don't elaborate on "far more socio-economically diverse", except for a strawman on Tibet (a few million Tibetans won't explain a high, and growing, Gini index). You write about the big regional difference in that growth, as if it were some unexpected development, rather than direct result of the government's policies, and if one didn't depend on the other. Arguments about "socio-economic diversity" also nicely ignore economic factors like trade flows and centralised redistribution -- something the USA does (for lots of years), something the EU-27 does (for a year), and something China did in the past and would have been free to do properly (but the announced big West China development projects come late, are insufficient, and as such may only achieve forestalling the growth of local unrest into a revolution, not to really even things out).

Back again to my original point, the trend is of a skyrocketing Gini Index, growing faster than in the neoliberal US or EU, which means the growth of a miniature elite and a small middle-class at the expense of peasants (who are also threanteded by the new Enclosures) and exploited migrant workers (the neoliberal EU is still much more labour-friendly than your "communist" PRC, in fact even the USA is).

For what it's worth, here is a source on EU ( -6, -9, -12, -15, -25, -27) Gini index [pdf!], tough it is based on a 2004 study that possibly uses even older numbers: it has the USA only at 39.4%. EU-27 comes in very close, 39.9%.

*Traitor*, n.
A benighted individual who perceives an illusory distinction between serving his nation and abetting the criminals who govern it.