Yes, a rabbit hole.
@dwerdd, the main variable with flex you left out, and that is that most skis are made mostly or partly of wood, no two pieces flexing alike even from the same tree, same part of that tree - so I've heard over and over.
More generally,
To me, with skis, when possible, our own experience is best, hopefully decisive. But we are all different, with different best choices.
So, for me, best I go by what I experience myself, my own body of experience/understandings, rather than specs or what anyone else tells me, other than using that stuff as pointers, indicators, sometimes as starting points, or to clarify or fine-tune things at times.
So maybe useful for clarification, in this case.
Also, correct me if I'm mistaken, but I believe I was told by the Nordica rep this time, in some detail, that the Enforcers have shapes and designs in common, and thus similarities, and some shared performance goals, and yet get slightly
different build materials/treatments according to length to keep the different lengths of a model performing as similarly and optimally as possible, rather than just a few prototype lengths being optimal.
Also, from my understandings/experiences/questionings/observations, there is a very noticeable difference in stiffness/flex within any set of the same ski model, same length, same year, same run. Often at the factory they will flex skis to match in pairs. I've described in other threads/years, the hours racers and their techs spend sorting out relative flexes in up to 30-40 pairs per top skier of the identical race models every year, and I've experienced these flex differences myself.
Again, the main reason, I've been told by many, for these differences is that the skis have wood in them, and wood has irregularities, and growth bands, all effecting the flex in irregular, ultimately hard to predict ways. Hence the need to both flex test (techs and racers) and slope test (each individual racer, or small groups of racers comparing observations with their techs, over and over, run after run; until the skis are sorted out in rows, in the order of stiffness, and even given flex numbers).
Occasionally, I've demoed a ski, only to find the particular pair I end up buying flexes noticeably differently, and performs differently, sometimes for me better, but sometimes worse. (Yes, I remember these performance differences; an odd ability. [Wish I could remember where I put my keys as easily.] A related ability is that I also remember the sound(s) of a particular guitar, both before modifications and after - again, an odd ability, but one that is not common among [guitar] luthiers, or players much better than me, I've found.)