I ask for a comparison on the two because I'm considering switching to a vest system, and these are the two that are most starkly different, at least as far as I can tell. The shoulder straps: Beuchats are wider, and fit more on the chest, so maybe the support is more spread out and less on the shoulders. The ball system for fitting under the weight belt: Beuchat has two balls on the sides (optional 3rd in the back), as opposed to one on the back.
Some stuff that might only come from first hand experence: maybe the vest is another place for air bubbles to become trapped and spook WSB at inappropriate moments?
Thanks