I cannot speak for the Carpet x Ball, but with the AfRock x Burm there is. If the sire is a Burm, and Dam an Afrock, the offspring come out with a busier pattern, hatch smaller (somewhere around 14" or so), and grow faster. When you breed the opposite, they hatch larger (18" or so), have a more reduced pattern, grow slower, and stay at a smaller size...normally around 10'.