The most noteworthy changes in the Motorola Droid X2 come down to speed and screen: First, the Droid X2 boasts one of Nvidia's superspeedy dual-core 1GHz processors. The original Droid X, in contrast, had a single-core TI OMAP chip. ... That's a 26 percent increase in pixels over the original Droid X's 480-by-854 screen.