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

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I am using Galaxy Watch 7 and Amazfit Active 3. Amazfit is closer to my professional medical devices from work. Edit: and topo maps are better than any app on Wear Os
I just upgraded to the galaxy watch 7 (just set it up it minutes ago) 40mm and the Watch 4 classic looks better and the rotating bezel protects the screen. I'm a little scared to break or scratch the glass of the 7. But it's quicker indeed, and lighter but let's see if battery life is better, I don't use the screen always on but was having bad battery life on my aged watch 4, that wad the main reason. I considered the OnePlus Watch 3 for its great battery life but since I own a Samsung s24 ultra decided to buy a used 7 for 81 euros.
If you're worried about battery life, I wouldn't go lte. Drains battery faster. Same thing with your phone on mobile data vs wifi. My gw7 dropped almost 30% battery to youtube music in around 3 hours of playback. That was using my galaxy buds, and having the songs pre-downloaded... on the 44mm Bluetooth model.
Oh yeah without youtube, I took this thing off at 3 am yesterday... at 65%. Music dropped it to that in a few hours though.
I got a refurb from Amazon for 150 US, and saw it for 140 a week later. Looks and works like new FWIW.
I use both the Galaxy Watch 7 and Garmin Instinct 3 Solar. I wear the GW7 during the week and the Garmin I3 Solar on the weekends, when I travel and on vacations so I don't have to worry about charging and I have something that'll actually last during full day GPS tracking. I like the Garmin health tracking but dislike not being able to select the notifications I want on the watch as well as the GW7.
I primarily use my Galaxy Watch 7 for blood pressure so I don't actually have it paired to my Pixel, oddly enough. I tried but the BP wouldn't transfer as it's exclusively Samsung. So yeah, hi, it's me carrying around my pixel main phone and my old Samsung just for Samsung Health.
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.

Ranked #1
Oura - Oura Ring Series

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Apple - Ultra Series

Ranked #1
Garmin - Enduro 3

Ranked #1
Garmin - Fenix 7 Series

Ranked #1
Garmin - Forerunner 255 Series

Ranked #1
Oura - Oura Ring Series