The SL is a directional twin, so it has symmetrical sidecuts and flex patterns with the binding stance slightly set back. If you move the bindings forward, you will get a ride like that of a true twin. Hope this helps!
They are always quick to respond over there. I got the same response about the heritage
The Heritage is also directional, but has symmetrical sidecuts and flex patterns, making it able to be ridden like a twin if the bindings are slightly set forward on the board.