There can be a benefit to the longer ball joint stud. Usually stock suspension geometry is designed to keep grandma from driving in to a ditch. Manufacturers have to keep the vehicle predictable and they set them up to react to the natural tendencies of “most” drivers. For instance, the natural reaction to understeer is to lift off the gas, which loads the front end and plants the tires. They can set up the car to be predictable and less likely to go out of control during these situations which may not be (and in most cases isn’t) the best for handling. Setting up your particular car for your driving style and usage (auto cross will be different from open road racing) will be a trial and error type of thing. So the blanket statement of “the longer ball joint stud being better” is subjective.