Cost of living in Kigali (Rwanda) is 5% cheaper than in Addis Ababa (Ethiopia)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 720 prices entered by 92 different people.
For example, to keep the same standard of living that would require 76,000 Birr in Addis Ababa you would need to make just about 71,847 Birr (2,218,506 Franc) in Kigali.