You might be a little biased. A neutral pundit describes the two stadiums in this manner:
Many SEC stadiums are located at or near the heart of campus. Williams-Brice Stadium loses some luster because of its location a couple miles from campus
by Columbia's fairgrounds. In that sense, it looks a bit like an NFL stadium, placed on the outskirts of town surrounded by masses of parking lots. It's nevertheless an intimidating home field, with a loud crowd that has grown to over 80,000.
About Kenan Stadium he writes:it is an underrated gem, nestled in a pine grove in the center of campus, with the iconic bell tower looming overhead.
Not many people view WBS as aesthetically pleasing, while Kenan Stadium is widely viewed as one of the most beautiful stadiums in the country.
As concerns the two practice facilities, in my view, there is very little difference between the two.
Have you visited both Kenan and UNC's new practice facility?
It is obvious that we view UNC and USC football facilities differently. I don't believe you are correct when you say that USC's facilities are far superior to those of UNC.