Agree with this, my Fischer Watea 184s were very similar under hand flex to my 181 Liberty Morphics but the difference when on piste was miles apart, the Fischers held an edge on anything bar sheet ice while the Librteys suffered on hard snow. They were both quite damp but the Fischers engaged the edge grip much more effectively and would hold the turn through great speed and edge angles much more like a GS ski would, ive also used Fischer GS skis with a full metal race plate in them and a metal plate under the bindings which are a totally different animal the effort required to flex them along with the angle that made the edges cut in was greater than any normal ski and much harder to achieve, compared to a shop version GS ski like the Salomon 24 hour race I used which are one of the best all round piste skis in my books they took the best bits of the race skis and the best bits of the piste skis and found a happy medium.
The best advice for the OP is to go and demo things as much as possible as everyone works a ski in a different way.