The Garden Wing is the 3-story building that has views of Bay Lake, a parking lot, the pool/grass or the canal that runs from Bay Lake to Seven Seas Lagoon. The laundry room is located in this building and there is a covered walkway leading from the GW to the Tower. There are no balconies in the GW, but ground floor rooms have a patio.
The Tower is 15 stories high with CA Grill being located on the 15th floor and the 12 and 14th floors are club level/concierge rooms. There are two Tower Views: Bay Lake and Magic Kingdom/Castle. All rooms have a balcony and are identical to the Garden Wing rooms. The Tower rooms are more expensive, with the TPV/MK Views costing more than the Bay Lake View.
Usually with a convention reservation, you're not guaranteed a room location or view. But since the CM asked you, I would have requested a Tower room. The views are amazing and everything you'd need (except the laundry) is under one roof. There's nothing like walking right out of your room and looking over at the monorail and looking down at the 4th floor Concourse