Samsung Gear S2 vs Gear S3 Frontier vs Gear S3 Classic: What's the difference and should I upgrade?

Samsung has just revealed the Gear S3 smartwatch collection, which consists of the Frontier and Classic models, both of which will be sold alongside the one-year-old Gear S2.

Just like the S2, the new models use the Tizen operating system and feature an innovative rotating bezel for scrolling without obscuring the touchscreen.

The Gear S3 Frontier and Classic retain both of these selling points, but add in a new design, GPS, an always-on display and extended battery life. But should S2 owners trade in their watch for the latest model? We've lined up the specs to find out.

By comparison, the Gear S3 Classic is similar in design to its S2 predecessor, but with its two side- buttons at the two o'clock and four o'clock positions being more pronounced than before. As you can see from the comparison image above, Samsung will sell two versions of the Gear S3. These will be called Gear S3 Frontier and Gear S3 Classic.

The Frontier has a bulkier, more robust bezel and a design similar to an outdoors adventure watch. It is also slightly heavier than the Classic and has "military style protection" according to Samsung. However, despite the waterproofing, Samsung says neither watch can be worn while swimming.

New for the Gear S3 range is an altimeter and barometer, plus a speedometer and an SOS feature to call the emergency services. A built-in speaker means you can use S Voice to make a phone call by speaking into the watch.

Where the Frontier comes with a rubberised strap as standard, the Classic is kitted with black leather. However, Samsung will sell a wide range of straps in different colours, and the universal lugs mean each watch attaches to any 22mm strap. In some countries, a version of the Frontier will be sold with LTE, enabling it to take calls and receive mobile data without being connected to a smartphone over Bluetooth.