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Hardware-wise the Xperia SP is a little fatter and a little heavier than SP, measuring 9.98mm thick (versus 9.7mm on the Xperia L) and weighing in at 155 grams – 18 grams heavier than the L. Pictured above, the Xperia L is on top, the SP is in the middle and the Xperia Z smartphone is on the bottom.
However, alongside the extra depth and weight comes a superior processor (1.7Ghz Qualcomm MSM8960Pro rather than the 1GHz dual core found on the L), a larger, higher resolution display and LTE compatibility.
The Xperia SP (but not the L) also has the transparant bar found on previous Sony handsets that changes colour according to what is being displayed on the screen, or can be set to be used as an alert for incoming calls or messages.
While the phones share much of the same user experience, the Sony SP also includes the company's new Social Life app.
Pricing for the Xperia SP and L has not been specified, but both devices are expected to launch within Q2 2013.