Colonial: Colonialism is a type of policy where control by one power or nation over another country as well as dependent area. Generally, the aim is related to economic dominant of colonized country
Socio-cultural imperialism: Socio-cultural imperialism related to culture. They imposed their culture to non- dominance country through economically or politically.
Economic imperialism: A situation where dominating country has lots of economic power over non-dominance country or area.
Similarities: These all are affected non-dominance country. Colonialism and imperialism both means domination in political and economic over other country or area.
Difference: The major difference is colonialism means complete control over the other country but imperialism means formally or informally control over other country