Both the Voyager and the enV Touch share the same side-opening clamshell form factor. The latter has an external 3-inch touchscreen display and an internal 3-inch screen that is controlled by a D-pad while the former has twin 2.8 inch screens. The new device is lacking the VCAST TV that the Voyager offers, but does have an improved 3.2MP camera.
The Voyager was quite a device at the time of its launch as it was the first feature phone to offer HTML browsing. With VCAST TV, the touchscreen and a full QWERTY keyboard, the handset helped coin the phrase "iPhone killer" and while the model never came close to slaying Apple's touchscreen unit, it was a huge seller for Big Red.
LG enV Touch Preliminary Specifications