Garmin
Forerunner 255 Series
Long battery; but wrist HR tracking is inconsistent.

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I liked my gen 1 SE, but when I actually got into slightly regular running I realised its limitations (hopeless battery and GPS, would sometimes miss tracking 10% of a Parkrun to the point of thinking that I’d levitated across a lake), switched to a Garmin and never looked back. I’m not entirely sure what the target customer for the AW is at this point.
The SE’s GPS is worthless. It would sometimes miss tracking 10% of a Parkrun to the point of thinking that I’d levitated across a lake. I completely lost trust in it being able to track accurately even in open fields. I switched to a Garmin and it actually does the basic job it’s supposed to do.
AWU2 here from last year and same. This watch will probably last me at least 3 more years, likely between 3-5. I had a SE from 2021 until 2024 (only upgraded because battery, not because I needed the new features) so will upgrade from this watch when battery becomes unusable or Apple brings really changing tech like actual hypertension readers/glucose monitors
I use an apple watch and garmin. Short review Apple is a kickass smart watch and a good Fitness watch Garmin is a kickass fitness watch but a dumb smart watch (I am in the apple ecosystem) My apple watch is 3 or 4 years old now. SE first gen battery %67. While doing my half marathon, I was anxious the whole time I will run out of battery before I finish the race. If you do swimming, Garmin is your choice - with apple over one year the corners get hit and that will allow water to get in. Garmin 265 is one year old and yet to face such issues. Plus the physical buttons make it convenient to operate. And the battery life is amazing. I charge the garmin once a week vs apple watch currently at twice a day.
It’s so expensive too. If you have an Apple Watch, Athlytic does the same thing as Whoop but way more economical. It has nearly the same parameters. Most importantly, the exertion measurement. It will tell you if you are overexerting, tell you if your sleep was shit and if any metrics are out of ordinary. It destroys Whoop in value. For android there are other apps that work good on the galaxy watch. Even Fitbit is better than whoop in terms of value ($9.99) https://preview.redd.it/qfsy6duvd2gf1.jpeg?width=1302&format=pjpg&auto=webp&s=4be30a657a738c29dc7f66ec7738ec992ac66487
I’m running with the dataless SE that just came out. Not much to compare against but it hits all my requirements and easily fits into the Apple ecosystem. My requirements were working with Apple Music and allowing me to leave my phone at home. Does a great job, good battery and most importantly can play DRM Apple Music offline.
Meanwhile my SE 1 drains 40% in 6 hours without doing anything in particular. Battery health is at 85%... Cellular off, Theater mode on, no notifications.
Funnily enough, for me it's the other way around: Apple is relatively accurate and Garmin struggles. For instance, when reading in bed, Apple told me that I was awake while Garmin counts that as sleep.
Garmin
Forerunner 255 Series
Long battery; but wrist HR tracking is inconsistent.

Garmin
Forerunner 955 Series
Best value, clear MIP screen; limited smartwatch features.

Garmin
Fenix 7 Series
Durable, multi-week battery, flashlight; high price, buggy software.
Garmin
Instinct 2 Series
Rugged, solar multi-week battery; bulky, small screen readability issues.

Garmin
Enduro 3
Multi-week solar battery, lightweight; but bulky form factor.

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Apple - Ultra Series

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Garmin - Enduro 3

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Garmin - Fenix 7 Series

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Garmin - Forerunner 255 Series

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Oura - Oura Ring Series