One of the biggest differences between an alpine binding and touring binding (besides the obvious) is the difference in stack height between the two. Alpine bindings have a lower stack height so they sit lower to the ski, giving you better snow/ski feel. The higher up you are off the ski, the weirder it feels.
So, if you are wanting the most alpine feel out of your touring binding, I would actually go with a Guardian or Tracker binding. Lower to the ski and more metal in the construction than a Duke...it will feel the most alpine of any of the touring bindings.
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