No, that isn't the same. You are comparing the upload size which is a Google Drive parameter and a cache backend parameter. They aren't the same and are for two different things.
I linked both docs.
Same thing here as they are two different things and it is explained here:
is a bad one to use as it allows for over mounting and hiding things and should be removed.
I have all my settings documented and explained here:
If you want to take a peek as I don't use the cache backend as I find it much slower for Plex use.