The second generation. That was fast. We just reviewed the Sony Xperia Z1 seven months ago – and we already have the successor in our editorial office: the Xperia Z2. Why an update for users of the predecessor does not make much sense, and why Sony still offers a great smartphone, is revealed in our review.
http://www.notebookcheck.net/Sony-Xperia-Z2-Smartphone-Review.116956.0.html
"Unfortunately, the build quality is not perfect, HTC and Samsung are superior."
Excuse me, but was this sentence translated correctly?
The "build quality" and the "design comfortability" are things very different. I think that you wanted to say "the phone feels a bit big, unsecure, etc...". Remember that every phone or whatever is fabricated in the same conditions with the same chinese materials, the same chips and the same Foxconn's assemblers. I loved the review, this may be the best ever Xperia Z2 review that I readed. Sorry, bad english.