The reason I am curios about this is I went hunting with a buddy a few weeks ago that was using the CTX-3030, and I had my E-Trac. I had a good Silver hit on the E-Trac(it turned out to be a Silver Quarter), and I invited him over to sweep the spot with the CTX before cutting the plug. While it did see it, it was no where near close to the clean clear response the E-Trac gave off. Looking back on it the only settings difference I think was that he was using auto noise cancel. Discrimination, ground type, sensitivity all were comparably set the same.