the STH14 Driver is basically the same binding as salomon's older stuff, just with a reinforced heel. the larger toe provides good contact with your boot and feels very solid when you're skiing, and personally, i think they 'ski' better than the FKS does, since the heel of the FKS is not nearly as laterally rigid as the salomon heel.
durability-wise, the win goes to the FKS. i've blown up countless salomon bindings, and while having a competent tech who knows the tricks to setting up a salomon binding certainly helps, they're just not as bomber as the FKS. i've exploded the heel housing, snapped the heel tray, and bent the pivot rod in the toe of salomon bindings plenty of times, but all i've ever broken on a pair of FKS/pivots were the brakes, which is almost to be expected, sadly.
i also feel more secure doing nose butters/presses with the pivots, probably due to the elasticity and the more vertical, direct nature of the heel design. the fulcrum point on a salomon heel is behind your boot, whereas on the pivot heel, it's almost directly above the DIN lug of the boot. i've also found that if the salomon toe isnt adjusted properly, it's really easy to turn out of the binding, and i've pulled skis off midair several times because of this. you don't have to deal with that with the FKS, provided your forward pressure is set properly, which you'd also have to do on the salomon anyway.
not really pushing you either way, just trying to give my honest opinion of both, having skied a lot of different gear over the years.