The Inquirer posted Sony Xperia Z3+ hands-on Review
A quote from the article:
An impressive array of new features, despite the name suggesting minor updates. SONY UNVEILED its latest top-end smartphone, the Sony Xperia Z3+ this week, with an updated, slimmer design, which has a lighter and sleeker frame compared with its predecessor, the Xperia Z3.Sony Xperia Z3+ hands-on Review @ The Inquirer
The Sony Xperia Z3+ has already been announced in Japan, where it is known as the Xperia Z4, but Sony decided to tweak its name for the UK given its arrival as an incremental update to the Xperia Z3.
Sony said that the name change is down to a focus on individual markets to drive sales in each region.