Chosen Solution
The internals of the screens are virtually the same, I’m curious if it’s possible.
I believe it can be done. Here is the teardown: https://www.ifixit.com/News/57101/steam-…
And here is the video, where screen on the 256GB model is replaced with the 512gb matte screen: https://youtu.be/o1MOHS48jRY?t=360