For your information, Moto X has a separate voice recognition system built-in to understand what you are saying in the most noisy of environments. Also, Moto Voice, which was previously called Touchless Control, works similar to Google Now, but it has improved features. It recognizes all the Google Now commands, plus Moto X own commands.
Below is the complete list of Moto voice commands that you can use to tell your Moto X what to do: As you may know, with the original Moto X (2013), just saying the “OK Google Now” will respond to you; with the new Moto X 2014, you can set up your own personal greeting (for instance “Ok Moto X”) to perk up its ears (source).
