The CE is a hardcover (lasts so much longer) and it has a whole chapter in the back devoted to concept art, and tips on things in game from the developers. The strategy guide doesn't have any of that and it's softcover.
While I wont pay more for a hard cover strat guide, interestingly enough both my Oblivion guide and Fallout 3 guide mysteriously lost their covers when I lent them to a friend.
The CE is a hardcover (lasts so much longer) and it has a whole chapter in the back devoted to concept art, and tips on things in game from the developers. The strategy guide doesn't have any of that and it's softcover.