One country sells organs of political prisoners on the black market and imprisons millions for religious beliefs. The other has millions of people including much of the media call the current leader a fool openly with no fear of arrest.
That there might be corruption in a prison system that leads some corrupt officials to do perverse acts like selling organs is one thing, but stating that this is a state sponsored practice is a bit extreme don't you think? Any links to what you are claiming would be good.
China has lifted 850 million people out of poverty. Percentage-wise, we have far more prisoners in the US. The answer lies in the instability that China experienced in the past leading to the largest famine in human history. They will certainly do what they need to do to prevent instability. Sometimes it is heavy-handed, but as I said in another thread we have Indian reservations, border detentions, hate groups, largest per capita prison population, a high murder rate. We are far from perfect it's easy to point the finger about something that you know less about.
Much like the Chinese would prefer to live under authoritarian but stable rule rather than whatever balkanized aberration a premature and flawed democracy that a billion illiterate peasants living in abject poverty would have produced.