Connectivity is where these two watches diverge most sharply, and the differences carry real consequences for daily use. The Samsung Galaxy Watch8 includes a cellular module and Wi-Fi, meaning it can receive calls, messages, and data independently of a paired phone — a significant advantage for runners, cyclists, or anyone who leaves their phone behind. The Huawei Watch GT 6 has neither, making it fully dependent on a Bluetooth-tethered phone for any live data or notification delivery beyond what is stored on the watch itself.
The GT 6 counters with two notable strengths of its own. First, it supports Bluetooth 6 versus the Watch8's Bluetooth 5.3 — a newer standard that offers improved connection stability and efficiency, which matters most in dense wireless environments. Second, and critically, the GT 6 is compatible with both iOS and Android, while the Galaxy Watch8 is Android-only. For iPhone users, the Watch8 is simply not an option, making this a decisive compatibility barrier. Both watches support NFC for contactless payments and Galileo satellite navigation, so those bases are covered equally.
The winner here depends entirely on your situation. The Galaxy Watch8's cellular independence is a meaningful real-world upgrade for users who want a truly standalone device, but only if they are on Android. The GT 6's cross-platform compatibility gives it a broader audience and its newer Bluetooth version is a plus, but the absence of cellular and Wi-Fi keeps it tethered. For Android users who want phone-free freedom, the Watch8 wins; for iPhone users or anyone not needing cellular, the GT 6 holds the connectivity advantage.