Yes, you can use a ticket card if preferred (the green ones with a character). They will work at all tap-points. If you are onsite though, the MB will be your room key and I don't think they give out cards for that anymore. Also, you won't be able to charge. The final difference is that the MB can be read to automatically add your ride photos to your PhotoPass or Memory Maker without having to stop at the monitors or counter to tap your card. If you are carrying the MB anywhere on your person though the photos should still come through.