Cost of living in Kigali (Rwanda) is 21% cheaper than in Addis Ababa (Ethiopia)
This comparison has some inconsistent or sparse data. It already provides a reliable comparison but it is not bullet-proof. It is based on 902 prices entered by 104 different people.
For example, to keep the same standard of living that would require 116,000 Birr in Addis Ababa you would need to make just about 91,596 Birr (2,908,363 Franc) in Kigali.