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

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Just switched from race 2 to 970. It was the sleep tracking and constant cadence lock when running without hr monitor that made me. I wanted to love it, but couldn’t. Resources and recovery was completely diffrent on app and watch, sleep recovery was always 79%+. None of the recovery metrics made any sense. I do hate the body battery and recovery timer on garmin but everything else is just better on garmin. Race 2 looks stunning tho, just a great looking watch
Not only 1 right answer. Coros, suunto, polar are all great watches and honestly it comes down to user. I have suunto vertical which have medicore WHR, their 2nd version of vertical 2 and race 2 improved that. But coros vertix, apex 4 or pacer pro are also great options. Consider some models from polar aswel, like grit x2 pro, vantage v3, etc. Garmin have lots of options aswel with their forerunner and fenix and enduro series. My suggestion would be to check out dcrainmaker reviews and some yt reviews to see what watch can offer you. Then download their software and play on your phone to see how good/bad software fells for you. I am unaware what ios integration will be since i am an android user soo yea. And yea at the end its realy user based as long as you go with watch with dual band gps systemy onboard maps, and other stuff. Garmin is leading in maps since only on their watches you can reroute your route on watch itself, other brands requirw phone to do that + garmin have the most smarr functions. Soo yea also i am suunto user soo i would say suunto but some1 else might dislike suunto soo again not only 1 answer but many options. Garmin is the best but some dislike their app which is harder to use than some others plus price. Suunto is behind in smart functions + can be buggy (mine is flawless but many have problems with newer watches), coros i ve heard lots of complains witz their sensors for alltitude and gps but that might be just users who dont know how to use watch properly, etc. Soo yea read some reviews 1st.
No way to know without buying a new Suunto and a new Garmin and comparing the 2 within their return windows. Keep the boxes and make sure to not scratch the watches and just compare. I say buy both a new Garmin and Suunto because coming from a 945 you're going to be impressed with any hardware that's new. I moved from a Fenix 6 to an Epix Pro and it has blown me away so far but I also bought a Race 2 to try out Suunto and I'm planning to keep just one.
Race 2, aestethics, all the important functions without unnecessary stats, great gps and battery
Garmin will give you much better/more reliable data overall (and of course much longer battery life). I had the Suunto Race 2 - I really loved the watch itself. It looked great, very well built, worked well - but there were some major software issues that pushed me toward returning it. The data on the watch was often different than what was showing up in the app. At that point, you start wondering which one was correct which made the whole experience unreliable. If they can iron out the software stuff and fix their bugs, Suunto would be a great option. The user comments were very consistent with my experience on their forums, but Suunto never commented on fixes. I also had the AWU for a while. Great smartwatch, but I felt like it was just a phone on my wrist which was eventually a burden that I didn’t appreciate. Garmin prices are high - but the overall experience if you’re into the stats is better than what anyone else currently provides. You can almost always score a 20% discount on their watches in some way (insurance, Runna, Optimity, etc) which makes the price more comfortable for the higher end stuff.
almost my case. I still have garmin fr945, suunto 9 and vertical 1. both suunto have big troubles with hr measurement, sleep accuracy not good. for cycling I have wahoo bolt v2 and v3, for concept2 - only ErgData app. withings smart scales is more than enough for me. one thing for me what suunto is missing is “resume later” function, especially for walking or hiking. I like suunto maps and navigation. now I’m confused to choose vertical 2 or race 2. both have better (I hope so) hr measurement and… thats all. ok ok, vertical 2 have led flashlight. vertical 2 disappointed me without local music storage and without nfc. but I like suunto for menu design, because garmin UI looks like designed for childs - not solid.
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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Oura - Oura Ring Series

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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

Ranked #1
Oura - Oura Ring Series