different bindings...the px12 jib is much more of a binding...better heal cuff and stronger construction...
the scratch 120 is for your every day smaller skier who wants to ride in the park, but if u weight more than 150 and ski hard i would step up to a jib(px12) binding. in addition to it being a stronger binding, it will last longer.
another option is the sth 12 or even 14...but for you guys...( i am assuming u are smaller skiers) the 14 might be unnessisary weight. check the 12s and the px12 jibs.