Show me a measurement that determines if the developers can write clean code, maintainable software, analyse and gather requirements plus design user interfaces and systems that add real value - then we can have a level playing field. Algorithmically the Chinese and Russians may be better, but that is a terribly one dimensional view of developer skill.
Yii2 is an example of a framework written by Chinese and Russian programmers, as far as I know, it's a pretty damn good framework compared to Symfony and Laravel. My 2 cents.