At initiation, that is, right after you leave the railroad tracks left by the left edges and start riding the tracks left by the right edges, the ski isn't bent much, and doesn't take much to bend it. As you increase the edge angle and tighten the turn going forwards from there, a softer ski will seem to want to dive into that turn, a stiff ski, unless you are carrying some speed, will resist and require more effort. On the other hand if you are carrying speed and turning hard on hard snow, the resistance is helpful in distributing the load. Horses for courses.
One thing that may have been overlooked in all the praise of the new softer longitudinal flex, but still stiff in torsion skis, is that if you find yourself in trouble and have come to expect grip, and think you can pull yourself out of the fire with a heavily loaded outside ski tip bent into just the right curve, you might just find that that tip unexpectedly bends much more than anticipated. It just might bend enough that the angle it's now trying to pull you at exceeds the available grip. Where as your old-school stiff ski would not bend that far and pull you out just fine.