Whenever it comes to smartphones, everyone compares it with Appleâ€™s iPhone in every aspect. Even though Iâ€™m a fan of iPhoneâ€™s hardware, iOS is not clearly not my way. I love Windows Phoneâ€™s Metro UI and the usability aspects when compared to iOS. Pocketnow have done a comparison of Windows Phone Mango with iOS 4 ( Why not iOS 5 beta? They claim its too buggy). Take a look at the video above to see how start-up time, multitasking, UI design, Apps and Music stores, Marketplace, web browser and music player of both the OS stacks against each other. What do you think of both the OSâ€™s? How can Microsoft improve Windows Phone Mango?