Because this one will do Google Assistant and Maps, which would be occasionally useful, or very useful for drivers. I don't know if it's worth sacrificing 2.5 weeks of battery life for.
I actually like Petal Maps and a few other hacky map apps for Huawei watch that just hijacks and displays notification directions. I do find it minimally viable for dumb smartwatch OS navigation. No transit support for my region though, which would be my primary use case. The other playstore apps can also hook into google maps from my understanding but has subscription which is big nope for just reading notifications.
I think my only complaint about Huawei watch is the buttons can't trigger camera shutter which $30 xiaomi band does fine. And the buttons can't be reprogrammed well. That and the watch face store is horribly organized. Jumping through hoops to get it synced to Google is annoying. But overall I'd take a nice looking fitness band with 3 weeks battery life over smart watch that has be recharged every few days.
I love the finish and materials on mine, the battery life, screen is good, fitness features are good. If I wanted the same in a Garmin it would be orders of magnitude more expensive.