I am not the one who needs convincing. Anyhow, a headline that reads 'New internet law will make us just like China' sounds so ridiculous most people wouldn't think it was true, even though it is. But 'Record label shuts down song by P Diddy, Will.i.am, Alicia Keys, Kanye West, Snoop Dogg, Chris Brown, The Game and Mary J Blige.' grabs attention.
Comparing tax-paying US companies to oppressive Chinese regimes isn't helpful when you're trying to persuade politicians.
Having a really easy to understand simple clear example of existing powers being used illegally should be helpful, although I realise that this example probably won't do anything.
You can't honestly say that the Chinese Internet censorship policy is a reversal from the heady pro-liberty days of the 1970s, for example. The most you can say is that China lost another opportunity to not oppress its people.