Why do Mopar Engines Have a Different Sound From Chevys and Fords??

It's easy to tell different makes from engine sounds... But honestly Every make has their same style set ups that people build over and over and thats what everyone hears. I can sit outside my work and tell when a honda/DSM/Subie is flying past or a chevy or a new mustang or some old pos phutt phuttphutting down the road. They are distinct sounds.