If your looking at either binding your really not looking for a binding to release.
PX 18
pros: bomb proof, all metal will not break on you.
no vertical release, (if your not a pansy).
tones of forward preasure
lots of travel in the binding before the release point, giving you more time to recover.
wide, non sliding AFD.
Cons: heavy, heavy, heavy,
no vertical release (if your a pansy)
Jester:
pros: relatively light,
little ramp angle (could be a con)
cons: weak (for a 16 din binding) they break all the time
not much metal,
expensive.
another you should look at:
STH 16
Pros: Light,
durable
wide foot print,
5 screw heel patern
wide AFD.
Cons: its not all metal so it still breaks if your a big guy and charge hard,
expensive