Review XPS 13 2-in-1 9310 Review: Great Output, Lackluster Input

I got a XPS 13 as my working machine ( albeit 2019 version) and it is slick and smooth, crisp display, light weight, long battery, awesome design.
The only part were it is lacking is indeed ports, only 2 USB C means docking station or port extender are a must. Other than that It beats Surface Books and any other Ultrabook even Mac Book Air.
 
Hi, I think there is a mistake in the review, The battery life of the ZenBook Flip S is way different from the one of the actual ZenBook Flip S review.
Also, the battery life of the XPS is substantially different in other reviews which is weird.
 
The review says the display is NOT IPS. Is that true? I found other reviews that said it was. What is this based on?