Needless to say, the model that has the higher resolution display going for it will be sold in the US, where consumers there would like to have all the glitz associated with high end smartphones, not to mention their purchasing power, while other markets will have to settle for the Full HD version. Of course, do take all of this with a pinch of salt, since nothing official has been confirmed just yet, so all of these could very well be hearsay.
In addition, it has been speculated that Sony has managed to introduce additional improvements the water resistant capabilities of the Xperia Z4, although the extent of that claim would need to be tried and tested when the handset itself rolls out officially. Are you looking forward to what the Sony Xperia Z4 is able to deliver?