不论新车旧车，试车是不可免滴

Not only for cars, for any items although their specifications are the same or look the same, there are always some thing different. For cars, with long string of steps in the making, more than 10k parts composing, human being factors, raw material variance, mahinery precision tolerance... all make the cars different one another. When you drive them, you can find one may be smoother, another with more power... One thing for sure, the cars aren't built in an ideal world.

Think it this way - even the twins from the same womb, the mother always knows who is who. Are they the same?