Guinea is 2.2 times larger than Benin.
Area: 112,622 km2 World Factbook
Population: 10,160,556 (July 2014) World Factbook
Benin, officially the Republic of Benin, is a country in West Africa. It is bordered by Togo to the west, by Nigeria to the east and by Burkina Faso and Niger to the north. Wikipedia
Area: 245,857 km2 World Factbook
Population: 11,474,383 (July 2014) World Factbook
Guinea, officially the Republic of Guinea, is a country in West Africa. Formerly known as French Guinea, it is today sometimes called Guinea-Conakry to distinguish it from its neighbour Guinea-Bissau and the Republic of Equatorial Guinea. Wikipedia