Choosing between the Apple Watch Series 10 and Ultra 2 comes down to size and price. But the Ultra 2 does have some hidden extra features that runners especially will want to know about.

The best October Prime Day 2024 smartwatch deals include savings on the new Apple Watch Series 10, the Series 9, Garmins, and more top options.

If you want the newest version of the Apple Watch (and we know you do), the just-launched Series 10 is already on sale, though not by much. The new smartwatch has a bigger OLED display with a wider viewing angle, not to mention a thinner, more lightweight design. The battery life can stretch to 18 hours, so it can run from morning to night.