I am not a fan of synthetic benchmarks, because they have little real-world meaning, to most people. I get about 8 hours with the 4K display, which is about on par with what I was getting with the MBP.
I would have to imagine the FHD does better. I saw a post from a rep in the Lenovo forums saying that the 4K version uses 70% more power than the FHD version. That really makes no sense to me and I am guessing it is a poor translation. I suspect what he meant was that the 4K version uses 30% more power than the FHD, not 70% more. Unless he just meant the display itself and not taking into account other components such as memory, SSD, etc? ¯\_(ツ)_/¯
I posted a comment to that review yesterday because I thought it odd that he stated something about the extremely glossy screen is a problem, when in fact the screen has an anti-glare/anti-smudge coating that makes it less glossy than many others I have seen in the class. Particularly the Gorilla Glass clad models such as the Surface Devices ( like my Surface Pro) and the Dell XPS 2-1. But comparing it even to my wife's 2016 MBP (and the screen hasn't changed noticeably from the 2018's I had in my possession), it is in my humble opinion less glossy than the MBP. The MPB is one of the better ones for glare. I could not post a photo to his review because my post count was too low, but the MBP display is on the right. Much shinier, clearer and more reflective, almost mirror-like. Oddly when I looked at his review of the MPB, Dell XPS 15 2-1, Surface Book 2, etc. He makes no mention of the glossy screen problem, despite them being glossier.
When the displays are turned on, the MBP is brighter and that levels the playing field, but I still found the comment puzzling.
Edit: Oh and that notebook check review also made some mention of not being able to confirm the Lenovo fast charge claim of 0-80% in 1 hour because after 70-some minutes he had only achieved 70% percent. Which is very different from my experience. I drained the battery and let it sit at zero for 12+ hours. Set a timer and charged the laptop for 60 minutes. My result was an 84% charge, doing better than Lenovo's claim.