Screen Differences between the 1080p and 4k model of the 15" 2070

Hi, so I am leaning towards paying the $500 extra to get the 4K touch version of the laptop, there are a lot of things that I can use touch for, faster navigation through menus, drawing/photo editing, and Bluestacks for Android use on my PC. Having used Surface Pro 2, 3, 4, Surface Book, and a Surface GO, there are plenty of times touching the screen is more useful than having to navigate with the touchpad or a mouse, and in some cases, faster. Before I justify this purchase, I've heard that the screens are slightly better as far as contrast, and nits, but I cannot see any actual information on this. If this is true, it's worth the purchase price alone as I am a huge media junkie. Even if I primarily use the device in 1080p(Or 4K with 200% resolution), touch is still super important. 60hz doesn't really bother me because I mostly play fighting games and action RPG's, not games like Fortnite or Call of Duty. I am a content creator and a Youtuber, and need something to stream on the go. Now, I know, $600 with the 2070/256GB of storage model, could get me a 2TB M2 SSD PCIE, however, the 512GB in the 4K version is enough to get by with a storage upgrade down the road, whereas 256GB is not. Thoughts? Anyone with a 4K Touch version happy with the decision? And why?