For selecting the right touring ski, a decisive factor is of course what type of ski tourer you generally are, i.e., what is your primary purpose you want to fulfill on skis. Of course, also playing a key role are of course snow conditions.
There are touring skis that are developed specifically for certain snow conditions. They are the best choice when you know precisely what you will expect on a tour. For hard-packed snow, for example, recommended is for example a narrower and stiffer ski. Depending on your personal preferences, you can select a ski with a smaller radius for short-radius turns and easy maneuverability on steep terrain. With a larger radius, on the other hand, you make sweeping long turns and have more control at higher speeds. Take note that for steep and icy sections on the climb, recommended is a straight ski with a wider radius and more camber. That ensures that you always have enough edge grip. Wider and heavier skis with tip and tail rockers are better suited for slushy snow and are more stable at higher speeds.
All-mountain skis are on the other hand a good compromise when the snow conditions will be changing over the course of a day. They can handle a multitude of conditions well – from hardpack and icy in the morning to soft and slushy in the afternoon.