For mortgage comparisons, keep the property decision separate from the loan decision. Put each financing option into the same template: deposit, monthly payment assumptions, fees, and what happens if your costs rise. Then ask lenders to explain anything that is not comparable. It makes the...
Also check whether any balcony, terrace or other outdoor space is included in the stated 70 m². If one comparable counts outdoor area differently, its apparent rate per square metre will be misleading.