US Coal may be behind, but overall, the US is cleaner. US has more nuclear, natural gas, and more renewables (Hydro, Wind, Solar) than China.
China greenhouse gas emissions per capita are less than half the USA's.[1]
1. https://wri.org/blog/2014/11/6-graphs-explain-world%E2%80%99...
China has 320 GW of installed hydro power, compared to 80 in the US.
China had 160 GW of installed wind power in 2016, compared to 80 in the US.