What ship are you sailing on?
The BE is the room category, which is basically the location on the ship where the room is located. There is no difference in the rooms of the same type. A BE balcony is the same room as a BA balcony except for the location of the room. Usually the closer to mid-ship, the more expensive the room. There is a category for Aft, Mid Ship, and Forward. Sometimes they break them out even further such as breaking the ship into 4-5 sections.
The standard balcony rooms on Princess are the same size, with the exception of the balconies on the Caribe deck. They have a slightly larger balcony (9x9 instead of 9x7) but the rooms are the same size.
I'm not sure what ship you are on, but Baja deck is typically Deck 11.