No, not very serious about that, just that just that a lot of 'great' comments without sufficient base, that's quite tiring to read and not very productive.
Of course it's very easy to say Koss Porta Pro is better than hd800. 'Better' is very WIDE, but in which direction?
Hohoho, nice example
But that's not the problem. The problem is:
You know the Eiffel Tower in Paris. He has about 300m. You know the Arc de Triomphe in Paris. He has about 50m
When I say, the Eiffel Tower is larger, there are 9 of 10 people, the cry immediately: Can they prove it? Where is the measurement - the fact?
And exactly here: You know, for a Koss Porta and to distinguish a HD800, I do not measure. The difference is much larger than my example. Only apparently not for many people.
My suggestion: You must learn, learn, learn, and maybe they can then in the end tell the difference between the Eiffel Tower and the Arc de Triomphe with the eyes.
This is the truth - the sad truth, sorry.