Hi Daryl, Welcome to the forum! Where the Equinox 600 and 800 share features they are identical, so no worries about any of the modes on the Equinox 600 being any less powerful than the same modes on the Equinox 800. Multi-IQ is identical on both models - there is no difference between the Equinox 600 and Equinox 800 in the Multi-IQ frequency range processed. The two obvious differences as touted in the poster below are the "Gold Detecting Mode" and the "Advanced Detector Settings
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