That is what I would guess because the Magic Kingdom view at the Contemporary shows all of it, where as the Magic Kingdom view at the Grand Floridian does not show all of it.
If you mean comparing the CR Magic Kingdom view to the Grand Floridian Magic Kingdom view, then it that case the Contemporary one would be worth more. Like I said before the Contemporary Magic Kingdom view is a full view and the Grand Floridian Magic Kingdom view is not a full view and parts of it might be obstructed. This is a picture of a Magic Kingdom view room when my family and I stayed there in August 2006 that was taken from room #4840 which is on the 12th floor, so you can see what that view would look like.