Joshua Moore wrote an answer about Mammut Pulse Barryvox Avalanche Beacon on April 1, 2012
I own a Pulse, and recommend it. I feel it is always worth the extra money. Never a regret in that investment.
Mammut sees it like this:
the PULSE is for:
Beginner with ambitions
Mountain / Ski guide and tour leader
and the ELEMENT for:
You can see a detailed comparison here: