using 14K and some 10K gold jewelry, no coins. Items were: mans medium weight wedding band, mans lite weight wedding band, tiny earing, another tiny earing, baby bracelet, childs ring, girls ring, girls chain bracelet, bangle (opened), medium weight Christian cross. Tested All Metal mode and Disc. mode with Disc. set at minimum. All signals were solid, no iffy signals were recorded. The result was both machines were within one inch of each other for every target in both modes. The Vaquero had a very slight edge on some targets and the Cortes had a very slight edge on some targets. The Vaquero ground balances in Disc. mode so that might give it more depth on buried targets when searching in discriminate mode. I thought the Vaquero with its higher frequency would be more sensitive to gold than the Cortes, but not according to my test. Hope this info helps someone choose between the two machines.