Real Differences between !00% line discount or Zero Cost on PO Line

Hi folks,

Can you advise me on what the true differences are between giving a 100% line discount on PO Versus changing Cost to Zero.

Apart from a few GL entries what is real difference or best practise.

Essentially I want to reveive an item with 0 cost…

Any help much appreciated

Post invoices with each scenario, use navigate to see the entries and compare them.