There's a new top Sony dog in town and its name is the Xperia XZ1. So, it's official: Sony is persisting with its, let's say, questionable naming convention. To be fair, we do see the consistency in it all, but it is still a rather silly title. Plus, we do have to complain about some aspect of the XZ1, since, frankly, after spending a bit of time with it, our initial impressions are really positive.
Source: http://www.gsmarena.com/moto_x4_ifa_2017-review-1652.php