Concepts big and small have arrived at SEMA this week in Las Vegas, including these two design concepts from Mazda. Demonstrating two vastly different takes on open-air performance, the 2016 MX-5 concepts stay true to the idea of pure, lightweight sports cars, resulting in the MX-5 Spyder and MX-5 Speedster. The Spyder goes classic, donning a silver paintjob and a brown top that provides a sophisticated interpretation of the classic vintage roadster, paired with a carbon fiber aero kit, grille intake and body cover, and lightweight 17-inch wheels. The Speedster, also based on the latest gen MX-5, also embraces the open air experience with a fully open-top devoid of a windshield and a set of performance upgrades that include 16-inch wheels, an adjustable suspension, a Racing Beat center-mount exhaust, and carbon fiber doors. Both deliveries are pretty slick, letting us down only in the fact that they won't be headed to production. Continue the preview below and let us know which of the two you would go for.