Cost of living in Guam is 107% 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 278 prices entered by 36 different people.
For example, you would need at least 3,718,566 ₦ ($10,387) in Guam to maintain the same standard of living that you can have with 1,800,000 ₦ in Abuja.