Cost of living in Havana (Cuba) is 71% more expensive than in Abuja (Nigeria)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 401 prices entered by 26 different people.
For example, you would need at least 2,810,763 ₦ (7,829 CUC) in Havana to maintain the same standard of living that you can have with 1,640,000 ₦ in Abuja.