Congrats on the new Car!
MDrive package includes Nav, Voice Control and MDrive.
MDrive allows you to preselect suspension and servortronic and DCT speeds as well and activate MDM mode. MDM allows less intervention from the of the traction control etc to allow for a little bit more spirited driving. Although still intrusive.
Competition Package includes DDC (EDC). If you go with the Sleeve over kit you will maintain the DDC (EDC) functionality. DDC and EDC are the same thing (for this discussion). Comp Package has an updated version of the EDC as originally offered