Question: what is the difference between xfinity and nascar?
Answer: The Xfinity Series is the old “Busch Series,” or the second tier of racing in NASCAR. There are a few differences between the two, but basically the Xfinity Series is there to be a “feeder” for talent to the NASCAR Cup Series. ... The Xfinity Series is the old “Busch Series,” or the second tier of racing in NASCAR.