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
Gear S3 frontier 46mm smartwatch (Bluetooth), Dark Gray
Samsung Gear S3 Frontier: Why Not Galaxy Watch? - YouTube
Samsung Gear S3 - Wikipedia
Samsung Gear S3 review: giving a full-on phone-on-a-watch a third go - CNET