Regular vs demo bindings

Hello people. I purchased some nordica patrons 113mm skis, and now I need some bindings. I weigh aprox 140 pounds and growing. I'm an intermediate to expert skier and am looking to use these skis for powder(small drops, spins, butters, switch.etc) not really charging, groomers and maybe the occasional park lap. The two bindings I am looking at are the marker griffon demo, I like it because I can adjust the mounting point and my father could give the skis a go, also wont have to remount if I swap my boots. Also looking at tge Salomon sth2 wtr 13, I feel like this binding would last longer and offer better performance. Both are equal prices. What I really want to know is how good the hold and durability of demo griffons is.