Thing is any audio systems can be optimised for the environment it is in, thus it will always have strengths and weaknesses and it depends upon how the car manufacturer has designed it to be, if indeed they have bothered and not just thrown big speakers at it. It is no good what so ever playing one track, or album, from one genre and then compare the same in another vehicle because each vehicle's audio system will be different and optimised in a different way.
Hence my term, cr*p in cr*p out.
I would never pay a sum of money for a 'proper' home audio system without it being at home to test first and foremost, then play known music that can fully test a system out, and these can be found in a good hifi publications worth their salt, and a selection of my own choice which I know can test a system.
Same should be said for car audio systems, however the environment within a car is probably one of the more challenging ones because it is inherently unstable thus changing the sound in subtle ways.
The other thing is that at different ages our ability to hear different frequencies, particularly the high ones, diminishes and alters. So a young person can probably pick up a 20hz-20,000hz, whereas someone older will not. Having said that this can also vary considerably from one person to another.
Basically the arguments about the *** versus the the B&O are more than likely to be subjective and should be treated with a pinch of salt and seen as what the individual is happy with.
Phew...