[Koha] Z39.50 Question regarding same title from multiple servers

When I search for a title using the ISBN (0842308245 - Endurance: Shackleton's Incredible Voyage) I get results from both the LoC and AMICUS. However, the "Import" link contains the same action for both results "javascript:Import(1,0)". My question is what happens if the records differ by source server? It appears it doesn't distinguish which one it actually imports but maybe I'm missing something. Mike D.