I recently unearthed an old iPad Air (first gen) and installed Infuse. iCloud sync did not perfectly sync the libraries to it. I know this because of the counts for Movies, TV Shows, and Other being displayed.
I also have an iPhone and Apple TV; both of these devices have all files matched up with their respective metadata, so that when I visit the “Library” setting, I can see Movies with n amount of items, TV Shows with n amount of items, and Other with 0 items. I never have anything in Other, as I ensure everything has been matched. Content is hosted in Google Drive.
The iPad showed 110 items in Other, despite iCloud supposedly having perfectly matched content and two devices synced to iCloud.
Here is the diagnostic code, generated pretty much as the next major operation after running a complete sync: TWPDW
Let me know if you need anything else.