More testing today just for fun, both devices configured to record a new track point once every 5 seconds, both with Multi-GNSS and Multi-Band enabled. Both units were hanging from my belt using Garmin Belt Clips, one on each side of me, for the duration of the test.
The majority of this hike was conducted under heavy tree cover (except for a few switchbacks at the far left) with very little clear sky.
The 66sr tracklog here looks like it had some trouble in the beginning, but once it settled both are again, close enough, however this time the 67 does appear to have outperformed the 66sr, in my opinion...
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