Garmin
Forerunner 255 Series
Long battery; but wrist HR tracking is inconsistent.
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they have excellent customer service as well and they were very pleasant and helpful when i spoke to them... when my old Apex developed a glitch they credited me the amount to get a new one after trouble shooting didn't work (it was the first model)... i paid a bit extra and updated to the apex 2 pro and it was such an easy and painless experience i also love my watch and its battery life!
Honestly, if you're not reaching the limits of the apple watch then it might not make sense to switch. For me, I've had the original Coros Apex for about 7 years and it's still working perfectly. I charge it every three weeks and that alone made it worth it to me.
I feel like Coros is almost there. Flashlight for sure is coming in a future watch (probably Vertix 4, then will trickle down to at least Apex 5). Design is obviously highly subjective, but I agree that Suunto has a cool design. However, I‘m digging the design of the Nomad and also the clean look of the Pace 4. Regarding more data in the web plattform or app. I‘m also very confident that they will add more stuff over time. Overall, going with Coros seems to be the best choice and it will only get better.
I was hoping for a better battery. I have an OG Apex 42mm that I use for daily wear and for hiking, running, and skiing. Yes, the Apex 4 has some feature improvements, but my current Apex 42mm (which has lost some battery capacity) still gives me battery life that seems to be about as good as the Apex 4. It's fine if the watch only has small improvements to its features, but the battery in the Apex 2 and 4 seems to be a downgrade from the OG Apex. The battery is the only consumable part, so it seems like these newer watches might a shorter usable lifespan than the one I already have.
It's fantastic, using it regularly for mountain biking, hiking, climbing. Kinda like the styling and doesn't shout "coros" on the dial like the apex series. It's very light.
This is not the point. It was mentioned here that coros does "no Feature lock" if the hardware can support the feature. And this is not true. Touring mode is another example. Bouldering as well. And yes some people want to do touring or bouldering with a pace, why not!? But again the point is that Coros is doing feature lock. Personally I do not miss the fishing mode on my Apex.
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 - Fenix 7 Series

Ranked #1
Garmin - Fenix 7 Series

Ranked #1
Garmin - Forerunner 255 Series

Ranked #1
Oura - Oura Ring Series