The difference is that local US companies have agency to refuse government overreach while Chinese companies are weaker in this regard. Chinese companies are more vulnerable to its govts pressure.
As it has been proven multiple times with the current US administration, no, US companies do not have the agency to refuse government overreach, they can just purchase favours (which I highly doubt is different from PRC and its government).
> The difference is that local US companies have agency to refuse government overreach
We're on HN, not The Onion's comment section. People will take this seriously rather than sarcasm.
It was sarcasm, right?
National Security Letters.
Or, worst comes to worst, as Snowden has revealed, the NSA will just clandestinely hack American companies, as they did to Google when they rolled out TLS for search.