Its quite a bit more than political, its historical, ethical, ... the whole bag of worms. I don't know if political discussions are allowed here, and I certainly don't want to take away from music, a great refuge from the insanity of the world, if they're not.
Sometimes the difference is more than 10%, of course, it was just a number I threw out for my point. I don't think we can simply treat the equation as a normal, trivial, consumption decision. Like you would compare brands of eggs or models of cars.