S7-392 Model difference

So what does garuntee you the higher resolution screen on a European model? On Amazon UK it's listed as an an S7-392 NX.MBKEK.003 which apparenlty is the 1080p version (according to support)

On the Acer website, in one part it says that they come with 4gb of ram and a 1920x1080p screen.

http://www.acer.co.uk/ac/en/GB/content/model-datasheet/NX.MG4EK.003

On Amazon it's listed as 8GB of ram and and no resolution stated http://www.amazon.co.uk/gp/product/B00FLPFZBS/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1

And then on another part of the Acer website it list's the S7-392 as having 3.3" WQHD 2560 x 1440 screen.

http://www.acer.co.uk/atouchmore/aspire-s7/

Ok we know that the USA version are at the moment restricted to a 1080p display, but it has been announced all over the web that EU models will have the WQHD display.

How are we to tell the difference when shopping in the UK?? Your website contadicts itself, not only on screen resolution but also on the amount of ram... I'm yet to read of a S7-392 with 4GB of ram.

This my first experience in dealing with Acer and so far it's a little confusing. Surely one of the representitives can explain where the confusion lies and why?