The Xceed Ennetti tires generally have less grip for the same shore rating. Not a huge difference, but noticeable. I've only had success using the Carbon Black wheels, the light ones will not take a hit. Once in a heat, I broke the edges of 3 out of 4 on the car. To date I have not broken a black wheel. On our track, low to medium grip, my Serpent 120L likes Parma yellow rears and Ennetti 35 fronts.