Is there a difference? both say 5v
If you want to charge your iPad mini in less than half the time of the 5w charger, you can buy the Apple 12W USB Power Adapter.
Actually, iPods, iPads and iPhones all charge using the same voltage. What is different between the chargers is how many watts you can draw from it.as stated, same wires different voltage cubes, they both charge both devices but the ipad cube will charge the ipad quicker