(quoting this to further explain)
Most people break brakes (especially on PX series bindings) due to a toe heavy switch landing, this puts leverage on the brake arms in a way they are not intended to go. The reason for the breakage is there is 1 single screw that holds that brake on to the binding, this normally will be fine during a standard ejection, however on the switch toe heavy landing, the brake arm is bent backwards at force which either breaks the plastic or rips/shears the screw. The difference in the turntable heel is that the brake mount is under the heel piece, therefore in order to rip it out, the entire heel would have to come out...which if you crash hard enough for that to happen, it would have happened on any binding. So instead of 1 screw holding that brake in there's 4 that hold it in, plus, the plate that holds it in under the binding (so even if you do rip the binding out, the brake doesn't necessarily come out, so you can get them remounted). The downside to this is very clear, if you do happen to break the brake arm (the new versions of the FKS/Pivot have a better brake arm than the old ones) you'll have to dismount the heel piece, then replace the part, then remount the heel piece. If you have a good enough shop, this usually isn't an issue, but it can be hard to get the piece from Rossi, so the easiest way to get this is to deal with a shop directly, instead of the easy fix of other brake replacements. However, it is much less likely to happen with FKS bindings, I used to ride PX series, Peak/Deadbolt series, and Royal Family series bindings....broke brakes on all of them, I have not broken a single brake on my FKS bindings since I started using them a few years ago.