Visually, they’re almost indistinguishable. Aside from a carrier logo and a barely perceptible tint of the white polycarbonate underneath the “hyperglaze” coating, these Galaxy S III devices are identical twins.

But looks, as they say, are only skin deep. One of these is the unlocked international version of Samsung’s newest powerhouse, while the other is the just-released North American variant (Sprint’s, in this case). Look under the hood and you’ll find some significant differences, and not just in the radio either: the international device packs a Samsung Exynos quad-core CPU supported by 1GB of RAM, while the Sprint version makes do with a dual-core Qualcomm Snapdragon S4, augmented by double the RAM at 2GB. In addition to differences in manufacturer, the respective processors also differ in manufacturing process: 28nm for the S4 and 32nm for the Exynos.

What does all this mean in the end? How do all the geebees and weefees and nms affect the end-user experience of owning these two devices? Only one way to find out: speed tests. In the video below, we pit the two versions of the Galaxy S III against each other in a series of app launch, video, browser, and benchmark tests – all the stuff we wanted to do, but didn’t have time to, in our first comparison video from the NYC launch event. Click the video below to see how these phones measure up!