I ran a 20-mile race wearing four fitness watches (like an idiot); here's what I learned

I ran a 20-mile race wearing a Garmin, Pixel, Apple, and Coros watch. You might be surprised how similar the results were in some areas — and how different in others.

source https://www.androidcentral.com/wearables/what-i-learned-running-20-mile-race-wearing-four-watches