Alpine MacDaddywrote a review of K2 Pinnacle 130 LV Alpine Touring Boot - Men's on September 19, 2016
Familiarity: I've put it through the wringer
I put about 40 days on these last year.
This boot is maybe a 90 or 100 in terms of stiffness. I can buckle them up tight and when driving my knees forward, they almost bottom out... I can watch the shell deform so much it's crazy. The top power strap velcro buckle contraption is a complete PITA. Also, I bought the 98mm last, and it seems much bigger, the liners are thick and have packed out quickly. As for touring, the range of motion is good enough.
I'm comparing this boot to my Head Raptor 130, 98mm which is so stiff that I barely ever tighten the top buckle much, and my foot fits snug with only the thin leather inner boot liner.
Maybe AT and Alpine boots aren't measured on the same stiffness or width scale?
On the plus side, I can wear one boot for slack country and resort, switching between regular alpine bindings and tech bindings - which is amazing.