Cost of living in Bologna (Italy) is 23% 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 376 prices entered by 64 different people.
For example, to keep the same standard of living that would require kr27,000 in Aalborg you would need to make just about kr20,808 (€2,795) in Bologna.