I've ridden quite a few burton boards in camber and Flying V. If you want best edge hold in ice go camber. If you want fun playful and good handling in powder go Flying V. Custom is a good all round board in both formats, it's a matter of preference, or go two boards for different conditions, such as custom camber or custom X for hard charging and ice and Sherlock or custom Flying V or Antler for soft snow.
Have always ridden a stiff camber board until I recently bought a Burton Antler, have mixed feelings about it. It is easy as hell to ride and impossible to catch an edge on (not literally I should imagine), when I go riding with the Mrs, its perfect for slower speeds, shallower terrains, powder and playing around the mountain.
Then had a day out with some mates, riding the black diamonds, steep thin cat tracks and fairly fast. I had the worst day I have had on a snowboard in years, felt like a beginner again, heel chatter, washing out, all over the place on cat tracks. I have no doubt this is partly down to technique and adapting to the board, but I wished so hard I had put my old board in the car.
Sure time will tell if I can fix these problems and improve my technique overall, love the new board, sure it will push my riding and force me to address some technique issues but also not similar at all to my stiff camber.
hope this helps