it just depends on what kind of riding your goin to be doin. if your gonna be chragin the wake and really tryin to flex the board out then a stiffer binding is better. gives you more control, like a snowboard. for rails and cruizin mellow then a looser binding like the roam binding is good. also depends on your prefference.
I used my 06 Parks on the board and liked riding it a lot. I purchased the Roam bindings and rode them once on the board and they just felt too loose. I will probably sell them and just use my Parks on the Roam from now on. All preference though I think.