As you might have guessed by their names, the Classic and the Frontier are two nearly identical watches separated mostly by their styles. The former sports a clean, unmarked, rotating bezel: There's a little texture around the bezel's edge to help you hang on while you're spinning it. Beyond that, it's all elegant lines swirling around a 316L stainless steel body. The Frontier, meanwhile, has hour and minute marks etched into its bezel, and its back and home buttons are nicely knurled for both utility and look. It's definitely the more masculine of the two, the sort of smartwatch you could imagine on the wrist of a technologically obsessed lumberjack.
You'd think the Frontier would be dramatically more resilient, but it's not. Both versions of the S3 are IP68 rated for water resistance, and their 1.3-inch screens are covered with panes of super scratch-resistant Gorilla Glass SR+. The list of similarities goes on from there: They share the same dual-core Exynos chipsets, 786MB of RAM, 4GB of internal storage, standalone GPS radios and 380mAh batteries. Speaking of batteries, Samsung claims both S3 versions should last between three and four days on a single charge, but we'll see about that.