The difference is a fantasy at least in the US. Your online activity even if protected by the company and not sold on the open market is subject to the subpoena powers of the state. These powers apply to all "business records" and have been contorted to serve as a justification of mass surveillance.
This illustrates the how governments are using tech companies to do their dirty work. They are the velvet glove over the iron hand of the state. They conceal and enable that which would otherwise be an obvious authoritarian grab prevented by civil liberties providing a convenient fig leaf over over otherwise naked government power.
I would expect this to be the case in all jurisdictions these companies operate in.
This illustrates the how governments are using tech companies to do their dirty work. They are the velvet glove over the iron hand of the state. They conceal and enable that which would otherwise be an obvious authoritarian grab prevented by civil liberties providing a convenient fig leaf over over otherwise naked government power.
I would expect this to be the case in all jurisdictions these companies operate in.