Originally Posted by
doconeill
Right now, the difference is that RFID cards exist, but MagicBands do not. :) I have yet to see one reliable report that Disney even has the MagicBands on hand yet.
When they have them, they will for the most part be interchangeable, with the RFID cards capable of doing almost everything, unless Disney decides to limit them more. The one thing that it appears the RFID cards won't be able to do is to trigger certain targeted experiences on rides which is done via a battery-powered transmitter in the MagicBand. Nothing specific has been announced as to what those may be, but and example could be something like a custom message on a screen during an attraction, etc. They have also alluded to that feature being used to inform the characters at meet&greets of the guest's name before being approached, so they'd be able to call them by name.