...there's a post over on the Camaro board asking why Chevies sound so much better than Fords....
It's all subjective guys -- we all like what we like, and it ain't all the same thing.
Many different things contribute to the exhaust note of a car - firing order, compression ratio, camshaft, intake/exhaust components - especially presence or not of cats, type/location of mufflers, size of the system, presence/type of crossover, header type, etc.
So -- you can say 'Ford sounds best' -- but the missing piece of that statement is 'to me'. It may not sound best to everyone. A simple fact of life.
My dad ranted and raved about Stan Kenton and his orchestra - I didn't even know who he was; me and my brothers couldn't get enough of the Beatles/Stones/Zeplin -- dad didn't like them. Some folks like Dave Matthews -- and I almost always turn the radio to another station when I hear one of their songs. Same thing -- we all like what we like.