TJazz, they are different tools and have to be handled differently, but both can, and the straight skis have for decades, serve you well.
Differences in carving, for instance: we taught carving on straigth skis for about forty years, and it became easier with stiffer and higher boots, but the carving on these skis is achieved by putting the skis on edge and putting a lot of forward pressure on the tongue of the boots which is transferred to the shovel of the ski, making it grip and carve. The tails of the skis do not grip much and thus chatter or wipe a broader track.
With shaped skis the difference largly is that with the wider tail, both shovel and tail grip when the ski is edged and a lot of forward pressure is not needed to bend it, mostly just standing on the center will carve the ski. Forward pressure is used to change the radius of the turn.
That said, a good skier who has carving down on straight skis, and using them, has no trouble staying in the tracks of a carving skier on shaped skis, the tracks will be wider but the body of the skier will describe the same arc and the skis will hold the same on the snow/ice.
Shaped skis just have brought carving to a lower level skier. Which is good.