The toe wings on the Alpinist are shorter requiring more effort to leverage the open therefore only two spring suffice vs 6 for the same retention on the Kingpin toe.
The Alpinist toe also uses carbon reinforced plastics to give the same strength as metal with less weight.
If you watch the attached video, Marker also claims they used the same formula in the heel plastics and replaced many metal components with lighter titanium.
The result is z binding with the same weight as the Dynafit Rotation/Radical 2 with superior power transmission of the Kingpin heel.
The only thing that stopped me from mounting Kingpins on my latest touring skis was the extra 400-500 grams weight over Techton/Radical 2. If the new lighter M Werks version had been available now, I would have purchased it and I believe that is why Marker is marketing it, to catch the market share they are losing to buyers who want lighter weight freeride tech bindings.