The user interface on both the Droid 3 and HTC Thunderbolt are similar, yet very different, at the same time. While both run on Android, with the Thunderbolt on 2.2, and the Droid 3 on 2.3, they both have their respective overlays running on top. MotoBLUR for the Droid 3 and Sense UI for the Thunderbolt. MotoBLUR was originally, extremely intrusive at one point, but Motorola has done a fantastic job, making it less and less intrusive with each iteration. This particular version is pretty much a 'lite' version of the original, connecting users to their social networks, but not bombarding them with information.
Sense UI has also undergone considerable changes, and on the Thunderbolt, it's integrated into the operating system. With each interactive release, Sense seems to continue merging itself into Android, giving HTC Android devices a unique interface to work with. Sense not only connects users to their social networks, but also provides a variety of widgets and customizable features to easily change the interface.
The Droid 3 does have a small advantage in that it has a slide out QWERTY keyboard, a very impressive one at that. The keyboard is very well designed, offering a comfortable amount of space, responsive keys and a dedicated row of numbers across the top. The Thunderbolt has to just rely on its on-screen keyboard, which, if users are writing long e-mails, it does get tiresome, even with the help of Swype. In the case of user interface, the Droid 3 slides in with the win with its slide out keyboard.
Winner - Motorola Droid 3