Sony Xperia Z and ZL are very similar devices, the main differences is the more compact form factor of the Xperia ZL and the fact that the Sony Xperia Z is water and dust resistant. Sony Mobile France has released a series of “Xperimentations videos” in slow motion that will show you the Xperia Z dipped in ink, water and dust/diamonds, and apparently it’s still working perfectly after that.
Xperia Z – Sony Xperimentations with black ink – slowmotion video 1
Xperia Z – Sony Xperimentations with diamonds – slowmotion video 2
Xperia Z – Sony Xperimentations with water – slowmotion video 2