Which car would be faster Ford Mustang Cobra SVT 2004 or Dodge Challenger R/T 2010?

well the ford mustang svt has 390hp thats what the factory rated but they have around 460hp on the flywheel and making it around 405hp to 415hp to the wheels and the dodge chalenger has 370hp to 375hp ,and another thing you gotta see is that the challenger its a much heavier car than the mustang weighing in at 4041lbs. the challenger weights 400-500lbs more than a mustang so the fastest will be the mustang svt