Huawei Watch GT 5 vs Samsung Galaxy Watch 6

“GT5 runs huawei own OS and no access to any google services - so not an option per what you are looking for. In terms of wear os watches you longest battery life is: technically the ticwatch atlas / enduro - standard is up to 5 days, but then extensive use of lcd screen and turning off features (essential modes) can extend it out further - but not a fan of their support or their durability (been issues with both). Then next best is OnePlus Watch 2 (up to 4 days) or Watch 3 (up to 5 days) - however can extend out to up 16 days by switching into their own os - however this takes away all the google services (incl nfc pay) - however only takes about 1 min to reboot back into wear os. Mixed use will generally give you between 5-12 days. Samsung GW Ultra - up to 3 days. For the rest you are looking at 1-2 days depending on model and size of model. Alt: no google services, but do offer their own payment system: Garmin with Garmin Pay; and Amazfit with Zepp Pay (note this is pretty restricted depending on country). For GT5 note that it looks like Huawei may be doing a deal with Curve which then may give them a payment option in some European countries.”

“just note that a Samsung GW6 isn't an option as its pretty much locked to an android phone (its possible via work arounds to get it to work with an apple watch but will reduce functionality of watch and all i have seen/read about this work around is that it doesn't work great and heavily reduces features - so not a recommend for what you want.”