Maybe the OP can tell us about plants. I am still confused on what is non relevant equipment. And his goals and the moral of the story etc... The only thing I can conclude from the facts presented in evidence is he and his friend like a different sound. What those sounds are are still un known even in verbiage.
So grasshopper what is the moral of story??? Maybe the OP thinks he has better ears than his friend. Of course we do not know what he likes or his abilities. Even in simple business strategy you need a objective so you can come up with strategies to reach it.
Yes I A realize the Zen master would be disappointed, I tried to inject a little logic in this discussion , but I was in the mood.
Enjoy the ride
Tom