Context: Voyager shows these options which results in a large amount of reports just being "Breaks community rules" with no info or reason whatsoever.
The difference is that China has a history of conquering lands around them, and has declared they want to conquer Taiwan and keep Taiwan.
The USA has not only not conquered lands since WWII but actually returned sovereignty to former territory since then. Americans don't want Cuba.
China is a dictatorship, and despite their election meddling the USA isn't there yet.