Cost of living in Ravenna (Italy) is 18% more expensive than in Zaragoza (Spain)
This comparison has some inconsistent or sparse data. It already provides a reliable comparison but it is not bullet-proof. It is based on 277 prices entered by 19 different people.
For example, you would need at least €2,598 in Ravenna to maintain the same standard of living that you can have with €2,200 in Zaragoza.