I may have misled unintentionally. I was on the 168 in both skis, not the 175.
In any case the stats above are not what I would have predicted for the 82 based on how they felt on snow. I suppose it's also possible that Fischer builds in a big stiffness jump between the 168 and the 175, especially since they've gone unisex.
Yes, in reviewing data on a bunch of skis in their database, it is clear that you cannot make assumptions about every length available when you've only skied one of them. Sure they may be similar in "flavor", but you really need a specific and direct comparison of the length in question for the ski you're interested in.
I think Phil has noted many times for this season how manufacturers are now scaling the ski performance based on the length so that there is more consistency in how each of the lengths of a model will ski. This really is a great turn of events in my opinion.