Samsung Galaxy Watch 7 vs. Galaxy Watch 6: Mostly unchanged, with nine key differences

Though you'd have trouble differentiating between a Galaxy Watch 7 and Watch 6 at first glance, the newer watch has some major upgrades beneath the surface, including some that have yet to be revealed.

source https://www.androidcentral.com/wearables/samsung-galaxy-watch-7-vs-galaxy-watch-6