Purposed leaked pictures make a device look ugly and big. I’d consider Xperia SP over ZL just because it should has a lower cost, and dual core (wich obviously should drain less battery than a quad core), I just hope it also features 2 GBs in RAM.
Sony is my favourite Android manufacturer, but it looks like there’s absolutely no Android manufacturer out there that realises many people want a high-end device that you can actually use comfortably with one hand.
Sony Xperia SP will have a 4.5-inch display, 1.7GHz dual-core Snapdragon S4 Plus CPU, 1GB of Installed RAM, supports 4G LTE connectivity and Android 4.1.2 OS.
Source: Xperia Blog