When it comes to features, it's still a tough battle between the Droid RAZR and Rezound. The Droid RAZR is packed with various features to help business users and regular users alike. It has a micro SIM card slot to allow for international roaming, government grade encryption along with Exchange ActiveSync, remote wipe, PIN lock, device encryption, and remote disabling of Wi-Fi and the camera. In addition, it can be hooked up to the Motorola accessories, such as the Lapdock and HD Station, further enhancing its capabilities.
The Rezound, on the other hand, goes more for consumers with its integration with Monster Beats. With this integration, the Rezound has an application specifically for enhancing music and the phone itself comes with a pair of nice (~$100) earphones further enhancing the sound quality. It's definitely a different direction than the Droid RAZR, but still a good direction to head towards.
Both smartphones come with an 8 megapixel camera, and both take great pictures and video. It's hard to determine which smartphone is better when it comes to camera capabilities. Both also offer a variety of options when taking pictures, and with the flash, both are capable of taking decent night shots.
As a whole, the Droid RAZR just barely edges out the Rezound with its many features. While music is an important aspect for some, it just doesn't quite meet the various different features found on the Droid RAZR.
Winner - Motorola Droid RAZR