My Whiteouts dimensions are 131-77-111 R13. The No 1 SL Blossoms are 123-67-104 and probably aren't far off the FIS SL dimensions, which aren't shown on the Blossom web site. Another matter is in the length of the skis, Whiteouts at 164cm and the FIS SL at 155cm (almost 4"s). Those differences should make for way different skis with one for hard snow and shorter turns and the other for shall I say more relaxed snow conditions and longer turns, not much longer as the Whiteouts are marked as R13. If 2021-22 is a great year for snow the Whiteouts will get in more days than the SLs, but if 21-22 is a drought year the Slaloms ought to get used more days than the Whiteouts. When I could ski (I've had some problems for almost 4 years now) I preferred FIS slaloms skis and used them most days. Hope to use these new Blossoms to get closer to where I'd like to be in my skiing.