Cost of living in Perugia (Italy) is 20% cheaper than in Aalborg (Denmark)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 151 prices entered by 19 different people.
For example, to keep the same standard of living that would require kr25,000 in Aalborg you would need to make just about kr20,124 (€2,697) in Perugia.