Congo, Dem. Rep. is 2.5 times larger than Tanzania.
Area: 2,344,858 km2 World Factbook
Population: 77,433,744 (July 2014) World Factbook
The Democratic Republic of the Congo, sometimes referred to as DR Congo, DRC, Congo, Congo-Kinshasa, DROC, or RDC, is a country located in the African Great Lakes region of Central Africa. It is the second largest country in Africa by area and the eleventh largest in the world. Wikipedia
Area: 947,300 km2 World Factbook
Population: 49,639,138 (July 2014) World Factbook
Tanzania, officially the United Republic of Tanzania, is a country in East Africa in the African Great Lakes region. It is bordered by Kenya and Uganda to the north; Rwanda, Burundi and the Democratic Republic of the Congo to the west; and Zambia, Malawi and Mozambique to the south. Wikipedia