This combination of colors simply makes sense on a GMT watch: The blue tracks link the day, and the black tracks the night. That is where any similarity effectively stops, because TAG Heuer has a case link design here which is wholly and entirely its own. With its angular lugs and sloped case sides, the Aquaracer GMT pits polished and brushed surfaces against a variety of case peaks and valleys. And then there is the dial, which is decorated with link a ridged, brushed design and a sun-ray finish, all in blue.