They are absolutely different flavors. OpenAI is not being told by the government to censor violence, sex or racism - they're being told that by their executives.
News flash: household-name businesses aren't going to repeat slurs if the media will use it to defame them. Nevermind the fact that people will (rightfully) hold you legally accountable and demand your testimony when ChatGPT starts offering unsupervised chemistry lessons - the threat of bad PR is all that is required to censor their models.
There's no agenda removing porn from ChatGPT any more than there's an agenda removing porn from the App Store or YouTube. It's about shrewd identity politics, not prudish shadow government conspiracies against you seeing sex and being bigoted.
Sigh. No. Censorship is censorship is censorship. That is true even if you happen to like and can generate a plausible defense of US version that happens to be business friendly ( as opposed to China's ruling party friendly ).
I don't know why people care if they're being censored by government officials or private billionaires. What difference does it make at the end of the day? why is one worse than the other?