Did they have a plate on them?
The current catalog lists 175,180,185 for Laser GS
https://issuu.com/stoeckli-the-swiss-ski/docs/ans-haendlerkatalog-2018-en/20
Thanks.
The SIA 19/20 demo versions had race plates on them, and race bindings (maybe not the top ones - Xcell 14, I recall). In the future, I'm told, the Stocklis will have Salomon plates and race bindings, probably without any loss in terms of feel. (As I'll bet you know, the Atomic race versions are almost the same binding.)
My own,14/15? Laser GS ~180/18 (not quite their exact specs) have full on Marker race plates and metal Comp 16 bindings.
I know, about the Stockli catalog specs of 175, 180, 185: I looked them up the next day and promptly got confused about what I'd skied. (Something different, apparently? Not sure.). The SIA ski itself did not have the radius printed on it visibly, nor the length (except possibly under the bindings). I asked the Stockli rep twice what length it was, figuring I could look up the radius. He told me 182. The shorter versions were out, he said. I know by the feel on the snow it was a bit longer than my own 14/15 version at around 180, I believe. I guess the SIA ski could have been 185. (I've skied that length in other non-FIS skis, and liked them a lot on other brands, but those have a different feel.)
Something similar happened the same two days with other skis:
The 19/20 Atomic G9 had 183/19.4 on it. The Atomic online 18/19 catalog, fortunately, has this non-FIS spec ski in it, exactly the same length and radius as my notes. Whew.
And third, the particular 19/20 Head W.C. Rebel iSpeed Pro I loved there had "183" and "r. 19.7" printed on it, by my notes. But the online current Head catalog only gives 175, 180, 185 as lengths, without the radii, as far as I can find, other than r. 18 for 180. So I could have been on 185/19.7 - again, not sure.
On having the race plates, I've skied the similar (a touch less stiff than the Stocklis, maybe) Head Rebel WC iSpeed Pro 180/18 from earlier years, besides the 19/20 longer version I skied at SIA (all with a version of FIS race plate and race bindings) and the Head Rebel WC iSpeed non-pro (with lesser plate and not full on race bindings), and all are good, but a bit different. The Pros have slightly more leverage and authority, and slightly more stiffness/stability along the running length; while the non-Pros had more playfulness but almost as much leverage, surprisingly, to me. With the right bindings on the non-Pros with lesser plate, I've liked them in several different configurations, about equally to the Pros, but different. It would probably be almost the same for the Laser GS skis, for me, I'd guess, with and without the true race plates.
By the way, for me, the Laser AX and Laser GS are distinctly different, and a nice complement to one another.