Iirc the SIDs for "default" accounts like administrator will be different on each windows install, and they certainly will be for non-default accounts, even if they're created using the same name.
I had totally forgotten about this when writing the original post you quoted - duh.
So if you plan on using security features (whether that be NTFS encryption, or just regular permission stuff), be careful. It
can cause problems if you're using the disk(s) in other machines.
I have strongly discouraged users from formatting their USB flash drives with NTFS directories if they are taking them outside their Windows domain for fear it might create ownership problems down the road.
-superticker
Not a good suggestion though - if somebody formats his drive as FAT, he'll be in a nasty situation once he's filled up some 100GB and need a file that's >4GB large

(but okay, at least there's transparent conversion
to NTFS with "convert.exe").