I recently moved from Garmin to an AW Ultra and started using WOD (quite an amazing app, congrats!).
I am still trying to figure out if Stryd (that I have been using for quite some time) is more precise than the native tools (be it pedometer or health). Any idea about that?
I was using a Stryd with Garmin and AW and stopped using it.
Found my AW without Stryd more consistent compared to Stryd when it comes to distance as with Stryd I have to calibrate depending on which shoes I am wearing.
DC Rainmaker published a comparison of Apple native power vs. Stryd:

Apple Watch Running Power Data Comparison (vs Garmin/Stryd/Polar/COROS)
Two weeks ago Apple announced a slate of huge sports-focused updates to the Apple Watch platform (called Watch OS). That platform will not only end up on current watches, but far more importantly on whatever watches Apple will likely

Power is behaving more or less the same between the platforms.