I don't think anyone can tell you specifically what they can be used for. That all depends on the operator....YOU. Each person is different in their likes and dislikes regarding ball layouts. Personally I like a lot of stable layouts, but most people like unstable layouts, where the pin and cg, or pin and MB are stacked. What really determmines what and when to use a certain ball is the surface,combined with your individual style.

If you really want to get some reponses, you should list your ball speed, general PAP location, ball weight, and where you like to play on the lanes. Tell whether you are rev dominant or speed dominant.Then post the pix and see what happens......

The layout won't exactly dictate the difference in ball reaction as much as each individual ball will. A layout is used to tweak the shape of the reaction the ball is supposed to give you.

If you were just looking for something as general as which ball should hook earlier or later I'm sure that could easily be figured out.