The folks at Wild Snow recently evaluated common alpine touring bindings to determine their relative stiffness, a quality which is correlated to ski performance. A stiff binding will prevent the feeling of “slop” in a turn, especially when skiing firm surfaces, breakable crust, or chunky crud. If you want to get the most out of your equipment it is probably worthwhile to choose a binding that is relatively stiff, as long as the binding’s other qualities like touring stride, overall weight, and ski crampon compatibility are acceptable. The results of the Wild Snow test are listed below as well as our comments on a few of these bindings we really like.
Backcountry Ski Binding Stiffness Comparison