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 review: giving a full-on phone-on-a-watch a third go - CNET
Samsung Gear S3 vs Gear S2 comparison - Android Authority
Samsung Galaxy Watch v Gear S3: The key differences between the smartwatches
Samsung Gear S3 Frontier Review: A Hefty Smartwatch Full of Features
Samsung Gear S3 vs Gear S2 comparison - Android Authority
Galaxy Watch vs Gear S3 (Worth The Upgrade?) Initial Impressions - YouTube
Apple Watch 3 vs Samsung Gear S3 Frontier – MBReviews