Well, look at this, $629 will net you a Sony Xperia Z direct from Sony's website in the US. That's the same price as the Xperia ZL. What's the difference? The Xperia Z has a glass back and waterproof design while the Xperia ZL has a plastic back, won't survive a swim but has US LTE 4G. Both GSM Android smartphones run Android 4.1.2 Jelly Bean on a 1.5GHz quad core Snapdragon CPU and have the same 5" full HD display and 13 megapixel rear camera. In fact, all internals are the same, you're looking at casing differences and the presence or absence of 4G LTE. Other amenities include a microSD card slot, a GPS with GLONASS and PS Mobile gaming.