A couple days ago Sonny Dickson shared a look at one of two early prototypes for the original iPhone, the iPod Click Wheel-based OS that iPod “Godfather” Tony Fadell was working on. Tonight, Dickson has shared a video pitting Fadell’s version against Scott Forstall’s icon-based iPhone prototype, which went on to become the basis for iOS.
Fadell’s prototype was referred to as P1 while Forstall’s prototype was referred to as P2. The two projects reportedly went head to head in 2005 when Steve Jobs pitted the two against each other. While the P1 used the click-wheel interface to navigate the OS, the P2 used a series of touch-based icons to move around the OS.
Both P1 and P2 run a prototype OS Apple codenamed “Acorn OS” internally, though Dickson notes that P1 runs faster because it uses a slimmed down version of Acorn OS. Each prototype also sports a unique logo that pops up after the Acorn OS logo while it boots up.