Your transition won't be so harsh because Never Summer has a rocker/camber hybrid shape. The rocker is in the middle with camber just outside the bindings. You will feel looseness when flat basing at first. The Proto carves well though so when you engage those edges, the camber will bite.
If you jib at all, you'll definitely notice the difference between rocker and camber. You'll notice that you slide on the rails/boxes much easier/smoother. This doesn't mean it will make you a jib expert. I'm just saying if you already have the technique down, it will just make things easier for ya.