[Auto_newb]

I've been thinking, is there a difference between a (roots)supercharged engine and an all motor engine? Both have power on the go, both have power all throughout the RPM range, and the only difference is the latter cost more to upgrade. If I just slapped on a s/c engine on a car and have a similar car with a similar engine and with similar horsepower, if you were to drive these 2 cars, could you ever tell that the first car was supercharged?