In the age of globalization, vanishing borders between the countries and the growth of mobility comparative analysis of the societies social structure and the nature of inequality becomes especially timely. This article presents a detailed analysis of the structure and depth of the countries inequality, as well as those of separate groups of countries in a more complex system of parameters. On the basis of the available data the authors attempt to test the hypothesis of the connection of inequality not only with the income level, but also with the imputed income per capita. The authors go beyond the standard instruments of measuring the inequality by income and offer their own modification of the decile exponent of inequality by imputed per capita GDP.