I can't comment much on carpet, but for asphalt, the 416 is tops, hands down! I've ran every version of the 415 (minus the MSXX, although I ran the MSXX top deck on my MRE). The 416 is just better over all. The best 415 was the original... hands down. Like everyone else is saying, it's all about setup. I've run the 416 on carpet (rubber tires) a few times. It handled great once I figured out what it needed for which ever track conditions came about. Overall, it took me a couple months to learn how to setup the car, and I was just coming from the MRE.