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Are there really any concrete advantages to the Oura ring over something like the Apple Watch? I used to own an Oura ring, but I returned it after I found basically no difference between ring's data and the watch with an app like Training Today. Maybe I just wasn't looking at the right stuff, though?

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My sense is watches actually have much finer granularity data collection, because of power capacity. The Oura collects data during wearer sleep about once a minute, while Samsung watch at least collects every 5-10 seconds. But in terms of sensor modalities they are the same.

Personally I much prefer rings to watches, that's all.

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