It's always fun to demo skis at Can Ski's hut at mid-mountain during our annual Whistler week. It used to be free, but now they charge all of $5.
And we got lucky-- the snow drought had just ended. I only got about four runs average per ski, but at least there was some firm snow as well as powder.
Several of these skis have something of a 5-point design. The most salient characteristic of which is that a 180cm ski will have about 140cm's-worth of edge engaging the snow. It's obviously a smart approach because it offers easy maneuvering on piste and plenty of float in the powder. The Quests, Rossi and Collective have this design.
Those models all feel somewhat similar. Pretty good edge grip, pretty light, the central section is of medium stiffness and dampness, and they have soft tips and tails for easy steering off piste.
The Head Collective (181cm) seemed to carve at high speed a little better than the other two and felt like it had about 160cm's worth of edge.
On piste the Salomons (180cm) turned like they had slightly shorter radius than the Rossi (similar length).
The Rev 90 is a good carving ski. The 181 felt like a damp 181centimeters with a stiffness of medium or medium-plus. I didn't get into the soft stuff, but they seemed to have very little tip rocker. I don't think they want to go off piste much.
The 189cm K2 Shreditor 102's blew me away on piste. Having a strongly rockered tips and tails, I didn't expect to like them much. I'm a hard-charging skier in the purely forward direction, but they felt long, edgy and damp. A plank on the snow-- a lot like my 183cm un-rockered Head Monster 82's! On the firm and grippy groomers they reminded me of my GS skis of yore.
They're stiffer than medium-- I'd guess like K2 Sidestashes and just less than Line Influence 105s. Off piste they steered really well when driven. They gave me confidence to charge through trees and cliffy areas more than I had earlier in the day.
I have no use for rockered tails, but they didn't seem to hurt anything.
At 189cm, they're a big ski for me (155 lbs. and 58 years), so I tried the 179's. YUCK! There's a huge difference between the two. The 179's are much softer and feel like greasy, short barrel staves.
So the 189cm model is my new favorite big mountain ski. Better than Volkl Katanas (too much rocker), Dynastar 105s (too much rocker and too stiff), K2 Sidestashes (too much rocker), Nordica Girishs (too stiff) and maybe Influence 105s (too stiff) for me.
Perhaps I'd like the K2 Annex's better. That's the similar model without a rockered tail.
How well you are able to ski is related to how hard you are willing to fall.