One area where Samsung does fare well is battery life, at least when compared to smartwatches like the Apple Watch Series 8 and the Google Pixel Watch. Yes, there are Garmins, Coros, and Suunto watches that can last much longer, but the 47-mm Classic lost only half its battery after a full day of use. Come morning, it had around 30 percent left, which was enough to last roughly until 5 pm the next day. This is with the always-on display, so when I turned it off, the battery comfortably stretched to two full days (with activity tracking thrown in there). It's nice not having to charge the battery every single day, but keep in mind that this is the largest of the Watch6 models. That means every other Watch6 will not last as long, which is a shame.
When compared to watches from Apple and Google, my sleep data didn't line up in terms of how long I was in REM or deep sleep, but too often, I did find that the Watch6 Classic thought I was sleeping for an extra 20 minutes longer than the Pixel Watch. It did, however, accurately catch when I fell asleep on the couch once, which the Apple Watch and Pixel Watch did not.
My favorite part of using a Galaxy Watch is the workout auto-detect and auto-pause functions. Samsung has always had excellent auto-detect capabilities, and I love not having to fiddle with the tiny screen just to start an activity. With an Apple Watch and Pixel Watch in tow, my workout results matched up pretty well—steps, active calories, and average heart rate. Even the GPS map it made of my power walk was accurate to a tee on all three.
The heart rate measurements did have some discrepancies sometimes, though. It was accurate when I did an indoor bike ride, but during a walk, I noticed that there were moments when the Galaxy Watch6 Classic showed my heartbeat was decidedly lower than the Pixel Watch and Apple Watch indicated. When I looked at the heart rate chart in the companion app post-workout, Google and Apple's chart had a similar trajectory, but Samsung's looked different. This didn't happen all the time though.
The Watch6's capabilities are fairly robust, and Samsung has been improving the app to make all the data the smartwatch collects easier to parse. However, I still think hardcore fitness folks using Android phones will want to stick to fitness trackers from the likes of Garmin. Anyone who prioritizes design (me) will probably keep the gorgeous Pixel Watch on their wrist, and if you want the absolute best battery life on a Wear OS watch, then Mobvoi's TicWatch Pro 5 beats out Samsung. Then again, no one else has a bezel that rotates. Tick-tick-tick-tick.