There is more difference in the 14 and the 16 than just the Din range.
The toes on the Sth14 vs. the Sth 16 are not necessarily the same. (I believe this story to be accurate.)
The original Sth 14 and Sth 16 came with the so-called "Driver" toe which is the older style Salomon 912- 916 design. They have had it for quite a few years.(10+)?? A very dependable and durable binding. The magazines say the difference in the Sth Driver versus the other Sth design is the wing width adjustment(which is in the side of the wings rather than being "automatic") which is true but they are also an entirely different configuration.
The other configuration was created when Salomon came out with the STh 12. The Sth 12 toe is a design along the lines of the Z series toes, but of a stronger/heavier duty design. Then they also began to, and still, make the Sth 14 in a non-"Driver" version but the Sth 16 is available in only one iteration.
The heels are the same.
Or did I just dream all this........................?
By the way, I believe the difference in cost between the Sth 14 and the Sth 14 "Driver" is about $20.