I'm not someone to speak knowledgably about ski tech, but I can relay what the binding selling ski shop person told me, and what the Tyrolia tech rep told me by phone this week. First, something about the Attack toe having a horizontal toe spring (vs PR's tip to tail?), where the horizontal spring configuration encompasses more area. Discriptively, he said a wider toe for a wider ski. Another technician said the Attack binding is "modern capture technology," and has a toe height adjustor. Additionally, he feels the Attack toe is more robust than the PR with negligible sacrifice in added weight. That's the limited info I can offer. Someone here might be able to translate more precisely what they may have meant.