Don't ask whats the difference to the Gallery, There is a great big difference or, I'm just helping you out.
O.K
1. Gallery is mainly for collections of pictures like NFS:PS
2. This is to show YOUR WORK not images from sites or sources
3. Gallery is small and has less capacity, and can only fit a small amount of images posted by users.
Just to let you guys and Girls know so no flaming happens.