I am considering buying a multi Mic for my Resound hearing aids. I might be able to buy it through Costco, but I am not sure since I did not buy the aids there. I could go through my Audi, but I think I will pay top dollar. This product is about $300 on Amazon and a bit less with Costco I think. I was just looking on Amazon and I see that they have the Mutli Mic for Resound and another which looks the same but is for GN Resound Unite Mini Microphone. The second one is $530. They look to be the same device, but I wonder does anyone know if there is a difference?