Oops. I didn't realize the new 13s didn't support WTR; I would have gotten the old model if I'd realized. Did I at least get some benefit from the new model?
The Grip Walk feature on your bindings is achieved with a mechanical slider instead of anti-friction device. So, in the event that you have old boots and the smooth spot under the ball of your boot shell is no longer smooth due to walking in parking lots etc., your bindings will still function properly and release at just the right moment.
Ok, there is your "some benefit". It is not much, but it's all I could come up with.