Replying to To rise or not to rise, that is the question.

What's everyone's view on risers on twintips. I have the chance to buy either the Rossi Axial2 140 TI PRO Wide Brake binding or the Scratch 140 TI bindings. The only difference between the bindings is that the Axial has a 6mm riser. I understand that the riser will create better edging but in a freestyle ski is it worth it? Can risers be detrimental to the performance of a twin tip and can it make the ski more difficult to handle in the air at all? Does anyone have any answers?