Cost of living in Pisa (Italy) is 52% 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 322 prices entered by 30 different people.
For example, you would need at least 2,281,866 ₦ (€5,115) in Pisa to maintain the same standard of living that you can have with 1,500,000 ₦ in Abuja.