What is the difference between Apple’s AirPrint and HP’s ePrint?

Apple’s AirPrint allows iPhone, iPad and iPod touch customers to print wirelessly to a local printer on their wireless network through an embedded OS print function. HP ePrint allows for printing from anywhere in the world from any mobile device to an HP ePrint enabled printer using the HP cloud* – that means the customer can attach a file or document to an email and send it to the printer’s individual email address. Both solutions remove the need for drivers or software downloads.

via Print with HP from your Apple iPad, iPhone or iPod touch via AirPrint | HP.