Hi Jerry,
By having the Automatic updates enabled, McAfee regularly updates and installs the current version of DAT available and helps in completing this cycle regularly. A superDAT is concerned mostly for troubleshooting where If you are concerned that you might have a virus and your DAT files are out of date, or the threat is blocking your updates, you can download the SuperDAT on another computer and the use a a CD or USB drive to copy it to your computer. Installing SuperDAT in other words is manually pushing a DAT which is expected to come over in the succeeding days .
Thanks,