Tog, though I'm not trying to be, I might come off as sounding elitist and snotty. At this point in your racing, concentrate on technique and not technology. If you want to race SuperG, you will need a straighter than current GS ski, anywhere from 10-20cm longer than you currently use for GS. Construction, flex, color, etc will have no bearing on results until you become technically proficient enough. If the 10.26 is a good bargain, get it. Compared to the current 10.22, it is straighter (yet way more shaped than true SG skis), and longer, possibly making an ideal SuperG ski for someone just starting out. If you are really interested in a true SuperG ski, you will have to search for a women's model. The men's version WILL be too long.
Contrary to most people's thoughts, DH and SG skis are relatively soft flexing. Certain risers stiffen up the waist of the ski, but since there is less sidecut, the softness of the flex allows the ski to bend so a clean arc can be carved. The speed event skis are also quite damp, so that having soft shovels don't start flapping around at speed. Speed event skis are also very heavy, weighing around 30 pounds including risers and bindings (I've skied with 3 pair over my shoulders too many times).
Masters race courses are WAY turnier than true FIS courses. This is for all events. One ex CDN National team member who came second this year at 24HRs of Aspen and raced the Ford King of the Mountain series fore-ran a Masters race DH on his 198 GS skis, and had the fastest time by 5 seconds. It is a testament to how turny the tracks are, and how technique is more important than technology.