Logically, the clear distinction between taking someone’s coat and copying someone’s music is obvious. Taking a coat provides a benefit to the taker, an act of taking, and a loss to the owner. Copying music provides benefit, but the other two aspects are not nearly as clear.
If one wouldn’t have bought it, where’s the loss?
Is it possible to “take” or steal something intangible?
What’s the halachic mekor for an issur?
Is there a Dina D’malchusa issue?
Because of these questions, Rabbis are all over the map here.