As was mentioned above, there are only so many ways that you can lay out a certain size space.  I noticed that my 2000 Winnie was identical in lay-out to the 2009....and probably all of the other 31' units.  They found a floorplan that works, and they stick with it.  
Sure, the cabinets and curtains will probably change over time or with models, but the floor plan will usually be the same.
You may find (though maybe not) that the "A" has better quality appointments since many of the things like appliances and such are pretty standard......or you may find that everything is the same, since it's giving the mfgr the advantage of buying in bulk for ALL of the coaches.