It might be true that 60 years ago the life of the Tibetans in China was not as good as those in India. Religions were not allowed to be practiced and people were suppressed. But now, things have changed.
Since 1980s, the Chinese government has allowed the practice of religions again. As long the teaching of the religion does not deviate from the original teaching and does not impose a threat to the stability of national security, the Chinese government will allow the religion to be practiced. Due to historical and culturally reason, the Chinese government is quite inclined to Buddhism. They allocated a lot of funds to refurbish the monasteries and they give support to spread Buddhism in China.
The CTA, on the other hand, does not seem to preserve Buddhism so well. Just look at the sex scandals they have helped to hide, this will affect how people perceived Buddhism. It will put people off from learning Tibetan Buddhism.