Sony took a rather unusual path with its flagship smartphone for 2013: it designed the hardware twice. The Xperia Z is ostensibly the star of the show with its glass body and waterproofing, but it's launching alongside the Xperia ZL, an equally brawny, yet plainer sibling. On a spec sheet, there's no apparent reason for the ZL to exist when its features almost perfectly match those of the slimmer and more stylish Z. Still, it's precisely that emphasis on function over form that might just win the day. Sony bi
