Ford redesigned both engines this year. The Vulcan uses different intake I know that, and I belive the Duratec does too. I know for a fact that the 3.0L 24V DOHC V6 has more torque and more HP this year, but I don't know about the 12V V6. It's been months now and they haven't released the HP ratings for the other engine, just the Duratec. Even the brochures that I have for the 04 don't list the 12V horsepower.