What is the difference between Subaru Impreza WRX and WRX STI?

There are some differences between Subaru Impreza WRX and WRX STI. Both are vehicles and have different advantages over each other. Subaru Impreza WRX and WRX STI differ in some ways. First, Subaru Impreza WRX came earlier than WRX STI, this means, the latter is equipped with some additional features which make it be more okay than the former. When it comes to power creation, WRX STI seems to have the capacity of producing more energy than WRX, although they have the same engine capacity.

WRX STI produces horsepower of 306, while WRX produces horsepower of 268. WRX STI is equipped with the turbocharger higher than that of WRX. The light from WRX STI is brighter than that of WRX. The former has HID lights and so much intensity and that's why it gives a clearer vision during the night, the latter is equipped with halogen lights. WRX STI has SI drive but WRX does not have.