It seems unfair to compare the pollution per capita of an industrial economy that is exporting lots of industrial goods with that of the service economy that is importing most of those industrial goods. To compare a region that is exporting solar panels to be with a region that is importing them.
There are undoubtedly corrections you can make to fairly compare China and Europe, and I don't know for sure if China is more green by those standards. But you're definitely not saying something meaningful.