I agree with ssh that Rossi's don't have great "feel," and would tend to place Fischers, Elans, and Volkls fairly high on feel. But what's interesting here IMO is that "feel" seems really to be two cross cutting axes: First is dampness/liveliness, about how vibrations do or don't travel down the ski. Second is sensitivity to horizontal deflection, how irregularities and texture of the snow is felt or not felt through the center of the ski. Is it supple or a plow?
So I can imagine a graph, high school geometry style, shaped like a "+" with the vertical axis being dampness (top is more damp, bottom more lively) and the horizontal being sensitivity to snow surface. (left side is more sensitive, right less.) I'd place Elans over in the upper left quadrant - damp but sensitive, as Dawgcatcher argues elsewhere. Fischers would be lower left quadrant - very lively and very sensitive. Rossis and Salomons would be in upper right quadrant - damp and not very sensitive. Some people would call that "smooth." Heads I would put in lower right - lively but insensitive. And so on. Some, like Atomics and Dynastars, are probably closer to the middle than others like Rossis and Fischers. Haven't skied Nordicas, so can't say where to put them. Ideas?
I'd also guess that physical variables like wood versus foam, or carbon version fiberglass have major impacts on these axes. (In tennis racquets, for instance, Kevlar is known to absorb vibrations but produce a numb feel, while fiberglass is soft and full of feel, and metal - Head used LM first in its racquets - tends to be smooth but whippy.) Basic weight will affect this cuz more mass means more inertia when ski encounters an irregularity, eg, more "smoothness."
Obviously stiffness gradients, torsion resistence counts. A soft shovel will allow vibration to begin, but a stiff midsection may erase it, like Volkls. And as Gandalf notes, the binding location may influence how much of this we feel though our boots. I would guess my Legends would feel a lot less lively if the binding were a couple of cm back because the waves of vibration that any shovel makes during a turn will have that much further to travel through wood and metal.
My axes may not be the right ones, and maybe we need more than two. But what if feel ain't a thing to define, but a place to visualize?