How are the northern part of the north european plain and the lowlands of the west siberian plain similar?

The Northern European plain and lowlands of West Siberian Plains have a lot of differences in terms of their characteristics. The only similarity between the two would be the vast complex land that both of these lands have. 

I hope this answered your question.

Both are part of the northern landforms of Russia.They are close, only separated by the Ural Mountains.Both have sources of water available.

Brazzaville and kinshasha, luanda,librevilleand and monrovia.