Again, it's a question of perspective. Mao killed dozens of millions of people and strongly supported the Khmer Rouge, which in turn were responsible for some of the worst atrocities of the 20th century. Xi seems to be performing a turn back towards authoritarianism.
Who do you trust? Out of both countries, I worry more about that which is less transparent and has less democratic institutions and less commitment to human rights. Though I worry about both, of course.