For more smartphone news and reviews: Windows Phone 7 and Windows Mobile are very much different. In a lot of ways, they are complete opposites. In Windows Mobile, you can customize your experience with a custom ROM or interface, plus you can change almost any aspect of the interface. In Windows Phone 7, you are limited to the interface that it comes with out of the box…you can’t even change the browser or the keyboard. Also, Windows Mobile is notoriously unstable unless you have the perfect ROM with performance tweaks. In Windows Phone 7, everything just works.