In pictures: The differences between the Sony Xperia Z4 and Xperia Z3

Announced three days ago, the Sony Xperia Z4 is a conflicting device. To start off, while it satisfies Sony's long-standing rule of refreshing their flagship line twice a year, some would argue that it fails to satisfy consumers' need for more palpable upgrades. Indeed, the Xperia Z4 is a lot alike the Xperia Z3, which, in turn, was a lot alike the Xperia Z2, which was... you guessed it – a lot alike the Xperia Z1...

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