I ski the '15-'16 Laser AX with the Attack 13 demo and hands down absolutely love it!
I am pretty sure the current SC and CX are the same skis, but with different width. The SX is stiffer for sure.
BTW- Renoun Z77 vs AX? Two very different ski's with different missions
Looking to demo the AX but nope can't find. Read lots of get things about then. Too expensive to buy without a demo. Looking for the 167cm. Someone will have to sell a pair sometime right.
PFFF, Scott @dawgcatching has a couple pairs of 175's with Aattacks used for literally less than 2 hours each pair for $950!
http://www.ebay.com/itm/stockli-Laser-Ax-2017-167cm/192130296568
Probably can't demo them but they are for sale...