Vaquero came out just a hair better (2% better) on air depth tests. Disc. mode set at just below IRON and All Metal with slight threshold, sensitivity at 10. All decent signals, not whisper signals. This was an air test only. Some will say it's worthless, but it showed me the machines are close, at least in the air. I will continue to use the Cortes because I like glancing at the screen before I dig.