I think KH3 looks great visually, and some scenes look more convincing than others in terms of how closely they resemble their CGI counterparts. And in motion, it is even more convincing. But in this article, having images directly comparable with sliders just show how much better CGI truly is (which of course makes sense, the amount of computing power put behind pre-rendered scenes should look a lot better). Characters skin, lighting, foliage, the hair, environmental details like the stonework/grass/flowers all look noticeably better in the film.
Still impressed with how close we can get given this is real time and running on a wide range of modest hardware, but the differences are certainly not all that hard to see.