I don't see a huge difference between the two, especially when the non symmetrical ski dimensions are close and the ski itself is center mounted....I've rode Anthems (symmetrical) before and i personally ride El Reys as my everyday ski (non- symmetrical). The Anthems seem to carve and maneuver a tiny bit easier when riding switch, but its a very subtle difference. As far as spinning goes, i didn't really notice and difference at all. But talk to Flashkick101 or something, he has all the answers..