1. China would not jail you for life for what you say on line. Canada would.
2. China always blocks or deletes your posts/accounts first, warn you next, not immediately take you to court/prison. And no cash rewards for someone to report your “crime”. Canada would immediately put you on trail and award the complainant $25000 CAD.
3. China would not jail you for saying something “harmful” to anyone such as man/woman/ LGBT/seniors and etc, as long as it is not “harmful” to the Party. Canada would jail you for saying anything anyone thought was “harmful” to them.
4. China would not punish you if you were not saying anything “harmful”. Chinese are safe if they are just shut up. Canada would if someone thought you might say something “harmful” in future but you haven’t said it. Canadians would not be safe even they were shut up.