The gauge is slightly different between the two. I believe the Brozz has a fuel level gauge and the Shark does not, but that is based on the photos on the Peace website.
Jass Motorsports (aka Kandi USA--the go kart people) are the most recent distributors for both bikes. My friend's distributorship distributes Kandi carts, and is supposed to get a price for me for both (my friend is also a licensed retailer). Also, my friend's company is located in City of Industry, California, where Jass/Kandi is located, so if anyone needs parts, he is able to get them (no matter where you buy a Shark or Brozz).
http://www.kandiusa.com/product_list.php?id=270