Based on what I've seen, the Full Swing will go longer and have more pop on the back part of the lane. IMHO, it's a response to ball reactions of last year on tour and even to some degree league shots in Tucson (can't speak for the rest of the country_ because it seemed that there was either less oil in the front part of the lane or the stronger coverstocks were eating it up faster. The ball companies are adjusting to that by using higher RG cores so that the balls will get through the front of the lane better.