I am currently using both an apple watch SE 2 and a garmin vivoactive 5 simultaneously. Even if the Garmin has better battery life, I don't really like it for 2 reasons: - the round watch UI is ugly and doesn't work with the other UI elements. Also I don't mind using a squared watch, I like it. My Casio is also square-ish. - the UX is terrible, the customization is terrible. The default watch faces are all quite ugly, and the Garmin app makes the customization experience even worse.

Also, I feel like the sleep is more accurate on the Apple watch than on the Garmin from a couple episodes that happened and in general from the differences in tracking time.

Also, as you already said, I just charge the watch everyday while I shower, so battery life is not really an issue for 80% of the time. For the other 20% it's really annoying... but I think a newer model (and I hope that the new ones will be even better on that side) will have better battery life. When the battery life will be ~48 hours it will be perfect for me.