There are clear differences between the K-girls and Chinese girls. The K-girls that I have known almost always share a decent apartment in NY with their "sisters". Most escaped abusive relationships with their husbands. Regularly go on vacation back to NY for group dinner gatherings, sushi, drinks, spa days, and shopping sprees for Western material possessions. Limited only by the past months earnings. Then, they go back to work. I have personally witnessed this with invites to Flushing.
The Chinese girls seem to be more individual. Living alone or perhaps with a family member. Or perhaps in a group house run by their managers, who I suspect are also their monitors for those who smuggled them into the US. Most that I meet seem to have left China for better economic opportunity or some form of government oppression, or failed marriages. These girls want to assimilate into US society, but are limited largely by language. And they are much less material, and more into retirement planning or sending money back to support family members, It is only in recent years that there has been an explosion of Chinese spas. But the move into FS spas has been rapid. This, I think, will change the landscape for many of the Chinese girls.
I don't know that any of the girls are forced to come here. But they make a choice as to how to get here, and what price they may pay to stay here. I don't know any of the inner workings of how the girls get here or how the debts are repaid. But I am sure there is plenty of abuses that go on. While I have mongered for many, many years, I can honestly say that I have never experienced a situation where I felt the Chinese girl was abused or in urgent danger. The Chinese women are highly intelligent and have gentle demeanors, and I have thoroughly enjoyed learning much about their culture. I would hope that if I experienced such a situation that I would find a way to help. But if they are illegal in this country, there are limitations on what help might be available without getting them deported or putting their families in danger.