Any Advantage to Installing Manufacturer's Drivers for GPU?

Solution
The Gigabyte drivers are just the Nvidia drivers that were out at the time the card was released, the latest drivers from Nvidia will contain updates that the older Gigabyte drivers don't have and will never get.
Manufacturer drivers are the same as nvidias drivers. Except it may come with some sort of overclocking software. Usually went you get a new card you install drivers directly from Nvidia's website because the ones that come on the CD are most likely out of date.