But that huge reduction in battery life is when you use GPS activity tracking. GPS usage on any watch will impact battery life, including the Apple Watch Ultra.

Comparing both watches in activity tracking mode + AOD off, the Garmin (44h) still has 2x the battery life compared to the Apple Watch Ultra (20h).

You’re cherry picking again…

You also get a huge reduction when you turn on SpO2 (off by default on Garmin, on by default on iWatch). Same for music, always on display, etc etc etc.