Audiophiles are funny people, Worldcup, as you will learn in short order if you hang out here very much. I recently had a man tell me with absolute seriousness that when he painted his listening room a different color it changed the sound coming out of his speakers. Not his perceptions but the actual character of the sound, itself. So it shouldn't surprise you that someone perceives differences when he changes the material of the fuse bases. Hell, a guy said awhile back on another site that one should never frame the art in one's listening room with metal because it would "create diffraction patterns in the electromagnetic force fields" and "utterly destroy your sound."
Funny, funny people....