Questions Compare customization attributes

Hello everyone, I am stuck on a problem and I would like to have your opinion.

We are in the process of changing the display of the General Sales Conditions and Special Sales Conditions on the Commercial Quotes generated by our sales representatives.

We have implemented 2 customization attributes for each of the product families:
- General Sales Condition URL
- the URL of the particular condition of sale

For the moment, we manage to get the 2 URLs at each line of prestation. Nevertheless we would like to make 2 changes to the current template.

First of all, we would like to know if it is possible to display these url outside the loop: Header of CRQuote - DetailSection - Footer of CRQuote? When we try, we manage to get the URL but only from the first line of prestation.

Then, and this is probably the most difficult point, we want to set up a condition through the field: VisibileExpression in order to meet these prerequisites:
- IF the url of article 1 is different from the url of article 2 THEN display both urls.
- IF the url of article 1 is identical to the url of article 2 THEN display only one url.

This process must be repeated for each of the prestations.

Attached is an example of the Report Designer template I use. The variable of the attribute I use to display the URL is in: detailSection3 --> [InventoryItem.ISKCGVCYB_Attributes]

I hope I have been clear, I remain available to answer your questions.

Best regards.