This is what keeps the Pixel Watch 3 on my wrist over the OnePlus Watch 3
For athletes, it's tough to compromise on heart rate accuracy.

I’ve been testing the Google Pixel Watch 3 and the OnePlus Watch 3 extensively since they were announced. Both smartwatches offer the latest Wear OS, a beautiful display, and a sleek build, and for day-to-day use, I’d happily wear either one. But the two watches couldn’t be any more different in a few key areas.
The OnePlus Watch 3 has impressed me with its battery life, proving itself as a true multi-day device. When I’m wearing it, this kind of convenience is a luxury. But the big praise it gains in endurance, the OnePlus Watch 3 loses in heart rate tracking, especially compared to the Pixel Watch 3, which offers some of the most accurate heart rate tracking in the game. That’s why Google has earned a permanent spot on my wrist.