Line {F05.00, r090} in template F 05.00 represents "loans formally secured by immovable property collateral", which may include commercial mortgage. This row classifies the loans and advances according to the collateral attached to them.
On the contrary, cell {F05.00, r120, c060} represents only loans to households (with or without collateral mortgage) with a view to acquire real property - for housing or for renting out. In this case, the criterion for the classification of the loans and advances is by purpose. It may be the case that a loan for house purchase does not have any immovable property attached as collateral.
These are two different disclosures (by collateral, r090, and by purpose, r120), which are not exclusive. In other words, the same loan granted to a household may be reported in both.