I compared the Moto 360 2nd Edition and the Huawei before making this final purchase and believe me I made a great choice. Luckyily I have both the Moto 360 and Huawei at my office place. The Samsung Watch outshines the both in majority of aspects.
Pros:
Light in weight and snugly to fit. Less bulk that Moto 360 and Huawei.
Battery backup would last 2-3 days depending upon your usage. Best among the group. Moto 360 has the worst as just lasts 1.5-2 days at maximum.
Display: Crystal clear display and best in the group outdoor sun visibility.
Charging: Wireless charger that takes around 2 hours to completely charge it from 0% -100% .
Cons:
Limited App availability and iOS support. It does not bother me much as my preferred apps are already there on Tizen and iOS support is coming later this quarter.