Cost of living in Guam is 103% 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 352 prices entered by 40 different people.
For example, you would need at least 4,187,161 ₦ ($11,862) in Guam to maintain the same standard of living that you can have with 2,060,000 ₦ in Abuja.