In my experience, either of those bands may not work for anything except possibly park admissions when you first arrive. For one trip, using a magic band from a prior visit, I had to go to the front desk to have my magic band “activated” for room charging to work after I was unable to charge lunch to the room using the band. No chance to use it to open the room door prior to that time since we had not yet been given a room number. They told me this was because I had not yet used the band to open the room door. Now I use
MDE to access any band that I want to use for a particular visit
once we have arrived on site, deactivate the band and immediately reactivate it. That usually fixes things without a trip to the front desk.