The card and a MagicBand both have the same short distance tech. So anything you can do with one that requires contact, you can do with the other. FastPass+, park admission, room charge, etc. The MagicBand also has long distance tech, do you can do things over a long distance w/o contact. The primary advantage to this is the ability to have ride photos/videos auto linked to your account as PPs have mentioned. However, that is also the tech used to do things in the rides, for instance IASW will specifically use your name in the "Goodbye Room". Nothing that will make or break your visit, but some people get a kick out of things like that.