Sorry to drag this one up, but when looking at the 7R02S202xxx pictures that Jeff posted, I noticed that there are no coat hangers, whereas 7R02S104xxx does. I see that 7F02K156xxx has coat hangers but they are behind the belt attachment point.
It also looks like 7R02S104xxx is attached much further back than the other two.
Finally I can add one more car to the discussion, 7R02C176xxx. Located like the 156 and 202 car, and no coat hanger.