If I were to describe the general feel I associate with Head skis (it's not there on every they put out, but enough for me to say it's a brand feel), I'd say they have a buttery flex combined with torsional stability and excellent grip that feels like forward slicing through the arc, as opposed to slow hugging. Pretty close in feeling to a Rossi FIS SL in that respect, but less trampoline-like, and a slicier feeling when the edge engages at the tip. Subjective as anything, I know, but what I'm basically saying is that if you like a Rossi FIS SL, I wouldn't write off Head skis.
Caveat: it's a long time since I was on a wide one.
What is torsional stability and how does one feel it?