I had the same question when I ordered mine a couple months ago. The cable on the site is a 1.3 version. Here's the response I received from them.
You are correct, the detail page for the Subaru DBW is currently out of date -thanks for bringing this to our attention!
You are correct, you would need the Subaru Drive-by-wire cable for your needs, which can be located at the following link:
http://www.tactrix.com/product_info.php?products_id=31 We appreciate you contacting us, and please let us know if you have further questions!
Amanda at Tactrix was very prompt with her responses. Purchasing the cable was quick, easy, and painless and arrived after a couple days. I haven't had any problems with it so far.