Cost of living in Szczecin (Poland) is 6% more expensive than in Łódź (Poland)
This comparison has some inconsistent or sparse data. It already provides a reliable comparison but it is not bullet-proof. It is based on 441 prices entered by 31 different people.
For example, you would need at least 9,833 zł in Szczecin to maintain the same standard of living that you can have with 9,300 zł in Łódź.