Both are really good on dry lane conditions. If I want a ball reaction to be more angular and agressive on the backend, I go with the Neptune. The Neptune to me is a stronger ball than the ratings would indicate when it hits friction. If the reaction I'm looking for is a smooth and controlled arc downlane, I roll the Natural. As was mentioned by someone earlier in the thread, those with a stronger hand and rev rate will find that this is a versatile Both balls store energy until they reach the pindeck and drives through to take out single or corner pins.