Symmetrical twintips are quite rare nowadays, which translates to majority of skis being asymmetrical, which translates to center mounting not being center of the sidecut, which translates to the ski performing better in the actual skiing part when not being center mounted, which translates to better performance off-center. Closer to center offers improved park performance on the cost of groomer performance. You need to be quite an advanced skier to notice this tho. I ski only park and have had all of my park skis center mounted and they've all been asymmetrical. Ordered a pair of Faction Prodigy 3.0x's and they're going to be mounted at -2cm tho.