To be honest buddy I think it needs to be your decision, there is a very even split of people on here who like one or the other. Some say the cup is to chavy, others say it goes with the car. Same with the sprint, some say its too subtle but some think it finishes off the back end.
You just need to to think if you had two identical cars at the same price one with the cup and one with the sprint, which one would you rather drive off in?