There are some advantages and disadvantages to each option with some being obvious and others not so obvious. We go over each one here to help potential buyers make their decision.
https://www.notebookcheck.net/Dell-XPS-13-9300-FHD-version-is-brighter-than-the-4K-UHD-version-and-other-interesting-differences.464844.0.html
There is also a FHD touch option. Does this one come with the glossy Gorilla Glass too?
So the 4K option doesn't have proper adobeRGB coverage, worse brightness and no matte option? They really hate high res displays huh?
They should stop putting 4k screen on any sub-15" laptop, period. Instead improve refresh rate and anti-glare.
copying Apple and removing daily used things by 95% of people like USB3 really shows how out of touch laptop makers are, there is room, it costs almost nothing, there is no reason not to have at least 1. Also the insistence on putting resolutions in them that no one can see at the expense of battery life everyone can see...I can only assume the insanity is being caused by money, thats usually the reason big business looses the plot.