Cost of living in Concordia (Argentina) is 40% cheaper than in Zapopan (Mexico)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 296 prices entered by 23 different people.
For example, to keep the same standard of living that would require Mex$ 61,000 in Zapopan you would need to make just about Mex$ 36,828 (ARS $57,771) in Concordia.