PREFIX=(qaohv)~&@%+ in raw 005 can be used to determine what the prefixes on a server are. If q is in there, assume q is owner. If a is in there, assume a is admin.
If q/a is before the first comma in CHANMODES=Ibeg,k,FJLfjl,ABCDGKMNOPQRSTcimnprstuz in raw 005 then they're owner/admin, but just not prefixed.
So, raw 005 is a more reliable way of finding out if owner and admin exist than looking at prefix changes, especially since q and a aren't always ~ and & when prefixed.