A recent teardown of Sony’s latest Xperia Z1 has shown something fairly interesting; it shares the same back cover and design as the original Xperia Z. Placement of things like NFC and the device motherboard are identical to the Xperia Z, and disassembly of both devices are pretty similar. The Xperia Z1 does offer slightly improved protection against dust and water resistance, but it’s more-or-less a slightly improved Xperia Z, in terms of just the outer hardware.
If you want to see the rest of the device torn apart, hit the break below. Don’t try to do this on your own, though; it’s a fairly complex process and it’ll just void your warranty.