i bot the rx12(176 i weigh 185) looking for a gs-lite type ski that would handle very firm east coast conditions - i was spending a week up in Stowe so I bought them basis the rec over at realskier (the site has served me well in terms of narrowing down choices for a four years now i think) and hadn't demo'd them but had owned Kastle many years ago and was pretty confident it was a good choice...i have just bought a pair of Laser SX (170) and thought i would give a brief comparo on this site as this site has also been a good read for a long time -
To me the rx12 are an excellent ski for firm west coast conditions but can meet their match on the blue stuff and the stocklis are fully comfortable and confidence inspiring on the bulletproof - I did demo this time and ski'd the sx all day yesterday and bot them upon returning the demo's to the shop....(they didnt have bindings in store appropriate for the sticks so now i gotta figure that out too).
i am not a writer (as im sure you can tell) but I will try and put it this way....i also ski rossi FIS slalom skis and the stocklis are much closer to that feel than to the rx12's ....what i mean is the kastle are probably more versatile for most folks but the top end in terms of power in/ power out is a notch below the lasers....there are definately days when i would prefer the kastles but they dont involve truly firm conditions...they are heading out west to wifes familys place there...
turn shape - somewhat similar though the kastles have a wider sweetspot -
laziness factor - ski the kastles after a giant lunch with 2 beers and they will get u back to the bottom
speed limit - stockli's dont have one - kastle you really shouldn't notice
build quality - both great but kastle is better - its more like a fine watch kind of build than a ski
i own both now and paid up for them (no bro deals but the stockli were pretty discounted as we approach march) so im not putting the
kastles down they are an incredible product ....stockli are a powerful semi-race type ski and maybe all i have learned is that is what I tend to like ......so not better or worse - bottom line the kastle is noticeably less powerful - just thought that might be useful info for somebody - tx