just to join everyone else here.....
They produce "fairly" similar 1/4mile times. From a dig its a decent race, but the cobra will still walk away. What many of you are not understanding is that an STi will generally run low 13's with a very good driver. the 13.1 time that C&D got is not what most people get from the car. Where as the 13.0 that C&D got is a little underrated for the cobra. Most drivers that have experience with the car have no trouble running 12.8's BONE STOCK. So even in the 1/4 the STi will trail 3 - 4 tenths of a second on average.
1/4 mile might be "similar" but that is because of the STi's launch. The cobra still makes about 100whp MORE than the STi and traps about 5-6mph higher as well.... The cobra is the clear beast of the highway here. In an STi you are looking at adding every bolt on imaginable to the car just to keep up at high speeds and more than likely if you want to edge him out you going to be needing an upgraded turbo.
suck, but its the truth. The car may suck in most other way, but cannot argue with the trannies ability to hold power and the insane potential of that car.