Originally Posted by dave lukins

The difference between sedition and treason consists primarily in the subjective ultimate object of the violation to the public peace. Sedition does not consist of levying war against a government nor of adhering to its enemies, giving enemies aid, and giving enemies comfort. Nor does it consist, in most representative democracies, of peaceful protest against a government, nor of attempting to change the government by democratic means (such as direct democracy or constitutional convention).

Put simply, sedition is the stirring up of rebellion against the government in power. Treason is the violation of allegiance to one's sovereign or state and has to do with giving aid to enemies or levying war. Sedition is more about encouraging the people to rebel, when treason is actually betraying the country.