You have a great car, but some folks prefer the comfort, ride, outward visibility, trunk space, rear seat room, and appearance, etc. of the Challenger. If you want a Challenger that will run with your car, you need the 485 or 707 horsepower engine.
The only problem with that much horsepower is that there is really nowhere to use it on public roads. You can do 100 mph in less than 10 seconds from a stop. The old saying is that it is more fun to drive a slow car fast, than to drive a fast car slow. If you want to accelerate hard from 40 to 80 mph, you don't get to stay on the throttle very long.