Motorola Droid X2
The first reviewer thought the X2 battery life was great because he came from a ThunderBolt, which is known for bad battery life. He thought the X2 battery life was great in comparison.
The second reviewer came from a Droid-X and he is accustomed to good battery life. He thought the X2 battery life was short in comparison. Since the Droid-X and X2 have the same battery, I suspect the X2 battery life is shorter because of the greater processing power.
We are probably going to have to wait for more reviews from former Droid-X owners to truly gauge the X2 battery life.