Here is a good article discussing rocker vs camber For Those About To Rocker (We Salute You) - How To Choose The Right Rockered Snowboard
But a short answer is that yes, a full cambered board stores more energy. That results in more pop for jumps, more responsiveness in your turns. The bad parts of camber are that if doesn't float in powder like a rocker board. To get that float on a camber board, you need to set your stance back a bit. A camber is also harder to butter than a rocker board.
As for catching an edge, a camber board does increase the chances of catching an edge vs a rocker board. I started on a camber board and my second was a rocker. The difference to me was amazing. The rocker board was a lot more playful.