Ahh the classic "you couldn't possibly say that if you understood, everyone but me is ignorant, I hold the sole truth" gambit.
If it comes down to brass tacks the US is worse than China, it's literally only been a handful of month since they massacred a school full of little kids, executed Caribbean boat crews without even a semblance of legal cause or process and shot civilians in the street with zero accountability (to just nominate some highlight from the last 6 months).
I'll say again, they are evil twins - China is evil too. But don't go giving the Americans a pass - the only real difference is the Chinese only physically oppress their own citizens* whereas as the US are happy to massacre anyone anywhere with zero legal justification.
The Chinese haven't toppled my (edit democratically elected) govt (although they tried to bribe a lot of them), the US did. The Chinese haven't slaughtered foreign civilians in decades, and the unwarranted illegal invasion ratio is about 10:1 in the last century.
But go on then. List a Chinese atrocity, and I'll line up a matching US one.
Slaughtering citizens check. Non-consenting medical experiments, check, oppression of minorities check, limitations on free speech and free movement check (done in different ways though I will acknowledge).
Both evil, both a pox on the planet.
Any differences (and there are some) are not enough to remove the evil twins tag - they're not identical twins though - more fraternal.
*Acknowledging that some of China's citizens really don't want to be citizens, same as a lot of people are under the American thumb that don't want to be.
Edit to add "democratically elected" to forestall assumptions about toppling dictators - held a huge popular mandate in fact (that should only narrow it down to about 20 of the times the US has over-turned govts lol)