I could buy a different heart rate sensor to use during runs and then compare the readings with those of my Apple Watch Series 10. As before, I'll note I'm running the latest watchOS 11 beta.

I don’t think anyone else would ever guess just by looking, but I know my Series 10 is made from titanium. I own one other watch with a titanium case and love the way the cool metal feels ...

To be fair, the Series 10’s most direct competitors, the Samsung Galaxy Watch 7 ($299) and Google Pixel Watch 3 ($349), don’t have weeks of battery life either, but both are a little better ...

Apple Watch Series 10: Apple Watch Series 8: Case size: 46mm: 46 x 39 x 9.7mm 42mm: 42 x 36 x 9.7 mm. 45mm: 45 x 38 x 10.7mm 41mm: 41mm x 35 x 10.7mm. ... Electrical heart sensor (ECG) ...