Burundi is 5.7% larger than Rwanda.
Area: 27,830 km2 World Factbook
Population: 10,395,931 (July 2014) World Factbook
Burundi, officially the Republic of Burundi, is a landlocked country in the African Great Lakes region of Southeast Africa, bordered by Rwanda to the north, Tanzania to the east and south and the Democratic Republic of the Congo to the west. It is also sometimes considered part of Central Africa. Wikipedia
Area: 26,338 km2 World Factbook
Population: 12,337,138 (July 2014) World Factbook
Rwanda, officially the Republic of Rwanda, is a sovereign state in central and east Africa. Located a few degrees south of the Equator, Rwanda is bordered by Uganda, Tanzania, Burundi and the Democratic Republic of the Congo. Wikipedia