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Rick Stella/Insider
The Apple Watch Series 9 and Ultra 2 are Apple's flagship smartwatches. While they share many similarities — the ability to track workouts, monitor sleep habits, and send call, text, and app notifications — some differences make one more suitable to some people than the other.
For instance, those wanting a premium smartwatch experience in a sleek form factor should opt for the Series 9. Conversely, if multi-day battery life, advanced activity tracking, and a rugged, durable design are preferred, then the Ultra 2 is the better choice.