This guy’s short video is the best no nonsense summary of what to do with new ADMX files.
In short, always overwrite any admx files with ones you KNOW are newer because they are named for the technology affected by the file. So newer is alway better. And if you copy one in and there is no overwrite? You now have totally new features to play with. Look at the XLSL file in the ADMX Zip files.