Cost of living in Basel (Switzerland) is 33% more expensive than in Aarhus (Denmark)
This comparison has some inconsistent or sparse data. It already provides a reliable comparison but it is not bullet-proof. It is based on 586 prices entered by 66 different people.
For example, you would need at least kr39,788 (CHF 6,139) in Basel to maintain the same standard of living that you can have with kr30,000 in Aarhus.