slow skyline but super fast rsx...why?

[DeeCee2]

I have a skyline and my brother has a rsx and his car is quite a bit faster than mine and we just got them and neither of us have done mods. I was wondering if mine might be messed up and if i should return it. Its not like slow slow, but his just has more zip to it. He beats me every time in a drag even when he gives me a car length head start. But he hasnt beaten me on the little track we made...im just a better driver.... muuuhhhaaaa. But do you guys think something might be wrong with my car or is every car different and he just happend to get a beast. Everything else is fine, no abnormal noise, steering is fine..its just slower, but i am still satisfied with it and still have fun. So tell me what's up. thanks.