I'm going to play devil's advocate here... Maemo OS 2005, OS 2006, OS 2007, OS 2008, Diablo (4.1) and Fremantle 5.0... versus 1.0, 1.1, 1.5, 1.6, 2.0 and 2.1. Even though Maemo has been around for longer, Android has made some serious strides with more internal and external devs on its project and is starting to get more right than wrong.