One advantage of the 75mm bindings is their flexibility. With the same bindings and skis, you can choose shoes with the stiffness that suits you. You can even select 75mm bindings with a removable cable, which offers greater flexibility in terms of boots and cables.
For broader skis and turns, 75mm bindings are recommended. Wider mountain skis with a waist wider than 60mm require greater stiffness in boots and bindings for proper steel-edge engagement. A stiff boot and 75mm cable binding are great for descents. Many 75mm cable bindings come equipped with plates and heel risers, making them more attractive for steeper skiing than BC bindings.
For comfort, hiking, and longer tours, BC bindings offer the best experience. The main focus is on comfort and distance, and BC bindings provide a much larger selection of compatible boots with more variation in stiffnesses, materials, and fits. This may make the choice a bit more challenging, but it increases the likelihood of finding the right boot.
The recommendation is to pair BC Magnum or 75mm bindings with stiffer boots on skis with a waist wider than 60mm. For those who prioritize comfort, frequent use, and longer tours, BC bindings offer the best experience.