Why use a mixture of Input.GetKeyDown() and CrossPlatformInputManager.GetButton()?

[E_D]

I notice the instructor uses both classes, Input and CrossPlatformInputManager, to get user input. Why not standardize on one?

[TorrqTB]

Ben is demonstrating there is more then one way to skin a cat.
However for best practices, he stated earlier that CrossPlatformInputManager is the suggested method for deploying to Mobile.