Let's once and for all dispel the myth that more megapixels always makes a better camera. The Droid Turbo's 21-megapixel camera takes somewhat sharper photos than the Moto X's 13-megapixel camera. Neither performs particularly well in low light.
But the Droid Turbo's camera is ironically slow as molasses, seemingly taking forever to focus and snap a photo. The Moto X lets you fire off photos in rapid succession, which is important when you're shooting a moving target.