Canned tunes on Edge and Gryphon are exactly the same. The only difference in the Gryphon is the ability to have custom tunes and of course the color of the unit itself.
With your driving needs, I would think you could benefit quite well from custom tunes, even on a relatively stock truck. Custom tunes can take into account your altitude, towing habits, driving style, road types, etc.
I don't think there is ever an instance where you won't notice a bigger difference with a custom tune versus the canned version.
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