Gear S3 Frontier vs Galaxy Watch3 - Technically it's a marginally thinner but smaller housing, narrower bezels, and weighs significantly less. It feels thinner than it looks, maybe due to the back
Samsung Gear S3 vs Gear S2 comparison - Android Authority
Samsung's Gear S3 goes a little too big | TechCrunch
Gear S3 frontier 46mm smartwatch (Bluetooth), Dark Gray
Huawei Watch 2 vs. Samsung Gear S3
Samsung Galaxy Watch vs Gear S3 in pictures - SamMobile