Cost of living in Exeter (United Kingdom) is 117% more expensive than in Aguascalientes (Mexico)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 397 prices entered by 37 different people.
For example, you would need at least Mex$ 43,467 (£1,679) in Exeter to maintain the same standard of living that you can have with Mex$ 20,000 in Aguascalientes.