Cost of living in San Juan (Puerto Rico) is 110% more expensive than in Aguascalientes (Mexico)
This comparison has some inconsistent or sparse data. It already provides a reliable comparison but it is not bullet-proof. It is based on 828 prices entered by 90 different people.
For example, you would need at least Mex$ 39,925 ($2,129) in San Juan to maintain the same standard of living that you can have with Mex$ 19,000 in Aguascalientes.