For example, Walter Becker offered the opinion that the Shure SM 57 is so omnidirectional, and has other characteristics, which tend to give it a slightly compressed sound when used to mic an amp, because some areas of the amp cone sound different from other areas. Some singers say that they sound much better with certain mics compared to others. (See Richard Monroe's remarks on the AKG 320 thread.) To the extent that certain mics favour certain voices, sounds, or frequency ranges, and have other sonic characteristics, I thought that they could be said to have different "voices," a term used to discribe the sound of various musical instruments. I assumed that this would be used to describe mics, but being a newbie, it seems I was wrong about that.
The point, of course, is not the terminology, but the variation in sound produced by one mic compared to another.