LAS VEGAS--The Sony Xperia Z (left) and the Sony Xperia ZL made their debut today at Sony's CES 2013 press conference. Though both devices have a similar feature set including Android 4.1 Jelly Bean, a Snapdragon S4 Pro quad-core processor, and 4G LTE, the Xperia Z has is taller, it has a larger battery, and it's fully water resistant.