Vilyuy vs Vitim

The Vilyuy is a river in the Sakha Republic of Russia and one of the Lena's principal tributaries. It flows for about 2,650 kilometers across central Siberia before joining the Lena, and its basin includes parts of the diamond-producing region around Mirny. The Vilyuy Dam complex was developed to supply power for mining and related settlements, linking the river to the economic history of Yakutia....

The Vitim is a major river of eastern Siberia and a right-bank tributary of the Lena. Including its headwater Vitimkan, it is about 1,978 kilometers long; it rises in the Transbaikal region, crosses remote mountainous and upland terrain, and joins the Lena near the settlement of Vitim. The river drains a large, sparsely populated basin shared by parts of Buryatia and the Sakha Republic. [Vitim ref...