As an American I'd rather be spied on by China than my own government because China spying on me won't discover anything that they can use against me themselves. That's not so for my own government.

I'd expect this is similar in most countries. Your own government is the biggest danger because your own government has much more power over you than foreign governments and much more interest in you. The biggest threat for an average civilian from a foreign government spying on them is that the foreign government might share that information with their their own government.

Since many European governments have close intelligence sharing arrangements with the US and do not have such arrangements with China, I'd expect that for the average European it would be better to be spied on by China than the US.

America has been exceptionally clear that US intelligence and immigration agencies consider non-Americans to be fair game for hacking, non-judicial imprisonment, torture et al.

So if I'm not American I might acknowledge that America treats it's own citizens slightly better than China treats theirs from a human rights perspective, but as someone who's British neither nation has a stellar track record of actions that effect me and my country personally or give me any rights protection.