There are more neo driver I like over any other type. Scientifically It would seem flux in the gap is flux in the gap. The flux measurments of neo drivers is more often higher than ceramic counterparts. Subjectively, I like the sounds of neo drivers over the ceramic counterpart. Cant say the ame about alnico. I havnt fooled with the sheilding properties in a while but alnico definately sheilds itself and I think the neo drivers are the same. I'll have to make a test.

Bill