There are of course exceptions, but I've found that as a general rule, one way to look at the types of cheater and race skis being described are to put them into three broad categories, slalom/slalom-like, in between/quick edge to edge (but often not as fully flexing as the slalom skis), and gs feel/type skis. Skis in the "in between" of around 180/18, e.g., both Stockli and Head versions, have to me a quick rebound optimally when not flexing as much as the slaloms; they do not feel like a gs ski either. From about 183 (and even more, 185), there is a transition to real, characteristic gs feel and dynamic, whether it is the Head Pro RWC RD 185 iSpeed at one end, or a 188/30 FIS GS ski (or a men's FIS spec gs ski also) at near the other extreme (for a gs ski). To me, both the SL lengths/radii and the GS lengths/radii flex more fully, optimally, and make more "in the groove" turns, either short turn or long. The "in between" skis, on the other hand, can be made to flex more fully also, but they have a great, quick rebound quality to them, that is in not so fully flexing.
Some years ago, I watched a video of Franz Klammer in retirement on Head iSpeed Rebel World Cup RD 180/18 skis (not the Pro version), and he was making very quick edge to edge turns, in bumps and on groomers, in the fall line but not fully flexing (to optimize rebound). If you had no idea who he was, he was still obviously an elite skier, but not fully flexing that ski, as I'm saying.